Mercedes Benz Diagnostic Codes: Your Ultimate Troubleshooting Guide

Mercedes Benz Diagnostic Codes are crucial for identifying and resolving issues in your vehicle. CARDIAGTECH.NET provides an in-depth guide to understanding these codes, ensuring your Mercedes runs smoothly with the right diagnostic tools and repair solutions, offering vehicle diagnostics and repair assistance. This article will help you learn about diagnostic tools, decoding common error messages, and pinpointing the right solutions to keep your Mercedes in peak condition.

1. Understanding Mercedes Benz Diagnostic Codes

What exactly are Mercedes Benz Diagnostic Codes and why are they important for maintaining your vehicle?

Mercedes Benz diagnostic codes, also known as Diagnostic Trouble Codes (DTCs), are alphanumeric codes used by your car’s onboard computer to signal malfunctions. These codes are essential for pinpointing issues, from minor sensor glitches to major system failures. According to a study by the University of California, Berkeley, modern vehicles have hundreds of sensors, each monitored by the onboard computer to optimize performance and safety (UC Berkeley, Dept. of Mechanical Engineering, 2022). Recognizing and addressing these codes promptly can prevent costly repairs and ensure your Mercedes continues to perform at its best, saving you money on car maintenance.

1.1. What is the Purpose of Diagnostic Trouble Codes (DTCs)?

Diagnostic Trouble Codes (DTCs) are your Mercedes’ way of communicating problems. They act as specific error messages, helping technicians quickly identify and address issues, ensuring efficient and accurate repairs.

DTCs serve as a vital communication tool between your vehicle and the mechanic. These codes provide a snapshot of the car’s health, pointing to specific areas that need attention. For example, a P0400 code indicates an issue with the exhaust gas recirculation system, while a P0700 code signals a problem within the transmission control system. According to the Society of Automotive Engineers (SAE), standardized DTCs ensure consistency across different vehicle makes and models, making diagnostics more straightforward (SAE International, Standard J2012, 2016). By using these codes, technicians can avoid guesswork, saving time and money while ensuring accurate fixes, and they’re particularly useful in diagnosing mercedes benz sprinter diagnostic codes.

1.2. How Do I Access Mercedes Benz Diagnostic Codes?

You can access Mercedes Benz diagnostic codes using an OBD-II scanner, which plugs into your car’s diagnostic port, typically located under the dashboard. This scanner reads the codes, providing valuable insights into your vehicle’s condition.

To access these codes, follow these steps:

1. Purchase an OBD-II Scanner: Available online or at auto parts stores.
2. Locate the OBD-II Port: Usually under the dashboard on the driver’s side.
3. Plug in the Scanner: Connect the scanner to the port.
4. Turn on the Ignition: But don’t start the engine.
5. Read the Codes: Follow the scanner’s instructions to retrieve the DTCs.

Many modern scanners can also provide real-time data and clear the codes after repairs. According to a study by Consumer Reports, using an OBD-II scanner can save car owners an average of $100-$300 per year by enabling them to diagnose and fix minor issues themselves (Consumer Reports, Automotive Diagnostic Tools, 2023). For more complex problems, this information helps you communicate effectively with your mechanic, ensuring a more efficient and transparent repair process.

1.3. Where Can I Find Reliable Mercedes Benz Diagnostic Tools?

CARDIAGTECH.NET offers a range of reliable Mercedes Benz diagnostic tools designed to meet the needs of both professional technicians and DIY enthusiasts, providing accurate and efficient diagnostics for your vehicle.

At CARDIAGTECH.NET, you can find tools that cater to various needs and budgets. Here’s a quick look at some options:

• Entry-Level Scanners: Ideal for basic diagnostics and reading/clearing codes.
• Mid-Range Scanners: Offer more advanced features like live data streaming and ABS/SRS diagnostics.
• Professional-Grade Tools: Provide comprehensive diagnostics, including module programming and advanced system testing.

According to a survey by the American Automobile Association (AAA), having access to reliable diagnostic tools can reduce repair costs by enabling proactive maintenance and preventing minor issues from escalating (AAA, Automotive Maintenance Survey, 2022). CARDIAGTECH.NET ensures you have the tools you need to keep your Mercedes in top condition, whether you’re a seasoned mechanic or a weekend DIYer. Contact us via Whatsapp at +1 (641) 206-8880 or visit our location at 276 Reock St, City of Orange, NJ 07050, United States.

2. Decoding Common Mercedes Benz Error Messages

What do common Mercedes Benz error messages mean and how can you interpret them accurately?

Decoding common Mercedes Benz error messages involves understanding the alphanumeric codes and their corresponding meanings. These codes provide valuable insights into the specific issues affecting your vehicle, allowing for targeted and effective repairs. A report by J.D. Power indicates that diagnostic accuracy is a key factor in customer satisfaction with automotive repairs (J.D. Power, Customer Satisfaction Index, 2023). Accurate interpretation of these codes, supported by reliable diagnostic tools from CARDIAGTECH.NET, ensures that you or your technician can address the root cause of the problem efficiently.

2.1. Fault Code: P261F71 – Circulation Pump Malfunction

What does the P261F71 fault code mean for Mercedes vehicles, particularly Sprinter vans, and what are the common causes and symptoms?

The P261F71 fault code indicates a malfunction in the circulation pump, specifically that the output for the circulation pump has a malfunction or the actuator is blocked. This issue is commonly seen in Mercedes Sprinter vans.

Fault Code Meaning:	The output for circulation pump has a malfunction. Actuator is blocked.
Known Problem Of:	Mercedes Sprinter Vans
Likely Causes:	Coolant intrusion into vacuum system via the water pump.
What’s Happening?:	On model OM651 4 Cylinder Diesel Engine the coolant water pump is vacuum actuated. The internal seal in the waterpump gives way and allows coolant (antifreeze) to enter the vacuum system. The vacuum system operates with the engine running. As the vehicle is driven the vacuum is so powerful it pulls coolant (antifreeeze) deeper into the vacuum system causing havoc on the entire vacuum system.
Possible Symptoms You May Experience	– Check Engine Light – Little to no acceleration – Coolant leak – Brake Pedal Pressure – Engine overheating
Parts That Could Need Replacement:	– Water Pump – Coolant – Seals – Tubes – Hoses – Vacuum Actuators – Vacuum Pump
System(s) Affected:	– Engine – Cooling System – Vacuum System – Turbocharging – Brake System
Severity:	Can be very severe if left unfixed Repair requires MASTER LEVEL Technician and not something for the DIYer

According to Mercedes-Benz technical service bulletins, coolant intrusion into the vacuum system is a frequent cause. This happens when the internal seal in the water pump fails, allowing coolant to enter the vacuum system, leading to a range of problems (Mercedes-Benz Technical Service Bulletin, DTB-2022). Ignoring this issue can lead to severe engine damage and compromise the braking system.

2.2. Fault Code: P126A00 – OM642 Engine Oil Cooler Leak

What does the P126A00 fault code signify in Mercedes vehicles with the OM642 engine, and what are the main reasons and signs of this problem?

The P126A00 fault code indicates an oil leak in the engine oil cooler specifically for vehicles equipped with the OM642 engine. This code often points to a failure in the intake port shutoff actuator.

Fault Code Meaning:	Intake Port Shutoff Actuator is faulty.
Known Problem Of:	Mercedes Sprinter Vans
Likely Causes:	Failure of component: intake manifolds, or the intake manifold actuator motor.
What’s Happening?:	Over time (several thousand miles) 50-100k miles the inside of the intake manifolds get clogged with EGR soot, buildup causing the intake swirl flaps to stick. The sticking or binding of these flaps then binds the motor which causes the check engine light and or a sever loss of acceleration.
Possible Symptoms You May Experience
Parts That Could Need Replacement:
System(s) Affected:	– Engine
Severity:	Can be very severe if left unfixed Repair requires MASTER LEVEL Technician and not something for the DIYer

Over time, the intake manifolds can become clogged with EGR soot, causing the intake swirl flaps to stick. This binding affects the motor, triggering the check engine light and potentially causing a significant loss of acceleration. A study by the German Automobile Club (ADAC) found that issues with the intake manifold and swirl flaps are common in diesel engines, leading to reduced performance and increased emissions (ADAC, Engine Failure Analysis, 2021). Addressing this issue promptly can prevent further engine damage and maintain optimal vehicle performance.

2.3. P0400 Series Mercedes Fault Codes Meaning

What do P0400 series Mercedes fault codes indicate, and how can they be effectively addressed to ensure optimal vehicle performance?

The P0400 series Mercedes fault codes generally relate to issues within the exhaust system, specifically concerning the Exhaust Gas Recirculation (EGR) system and related components. Addressing these codes promptly is essential to maintain vehicle performance and reduce emissions.

Mercedes Fault Code	Fault Code Meaning
P0466	Purge Flow Sensor Circuit Range/Performance
P0467	Purge Flow Sensor Circuit Low Input
P0468	Purge Flow Sensor Circuit High Input
P0469	Purge Flow Sensor Circuit Intermittent
P0470	Exhaust Pressure Sensor Malfunction
P0471	Exhaust Pressure Sensor Range/Performance
P0472	Exhaust Pressure Sensor Low
P0473	Exhaust Pressure Sensor High
P0474	Exhaust Pressure Sensor Intermittent
P0475	Exhaust Pressure Control Valve Malfunction
P0476	Exhaust Pressure Control Valve Range/Performance
P0477	Exhaust Pressure Control Valve Low
P0478	Exhaust Pressure Control Valve High
P0479	Exhaust Pressure Control Valve Intermittent
P0480	Cooling Fan 1 Control Circuit Malfunction
P0481	Cooling Fan 2 Control Circuit Malfunction
P0482	Cooling Fan 3 Control Circuit Malfunction
P0483	Cooling Fan Rationality Check Malfunction
P0484	Cooling Fan Circuit Over Current
P0485	Cooling Fan Power/Ground Circuit Malfunction

According to the U.S. Environmental Protection Agency (EPA), a malfunctioning EGR system can lead to increased emissions and reduced fuel efficiency (EPA, Vehicle Emissions Standards, 2020). Regular inspections and timely repairs of the EGR system components, guided by accurate diagnostic tools, ensure your Mercedes complies with environmental standards and maintains optimal performance. CARDIAGTECH.NET offers a range of diagnostic tools to help you identify and resolve these issues efficiently.

2.4. P0500 Series Mercedes Fault Codes Meaning

What issues are indicated by the P0500 series Mercedes fault codes, and how can they be resolved to maintain vehicle safety and performance?

The P0500 series Mercedes fault codes typically relate to issues with vehicle speed sensors, idle control systems, and other engine management sensors. Addressing these codes promptly is crucial for maintaining vehicle safety and performance.

Mercedes Fault Code	Fault Code Meaning
P0500	Vehicle Speed Sensor Malfunction
P0501	Vehicle Speed Sensor Range/Performance
P0502	Vehicle Speed Sensor Low Input
P0503	Vehicle Speed Sensor Intermittent/Erratic/High
P0505	Idle Control System Malfunction
P0506	Idle Control System RPM Lower Than Expected
P0507	Idle Control System RPM Higher Than Expected
P0510	Closed Throttle Position Switch Malfunction
P0520	Engine Oil Pressure Sensor/Switch Circuit Malfunction
P0521	Engine Oil Pressure Sensor/Switch Circuit Range/Performance
P0522	Engine Oil Pressure Sensor/Switch Circuit Low Voltage
P0523	Engine Oil Pressure Sensor/Switch Circuit High Voltage
P0530	A/C Refrigerant Pressure Sensor Circuit Malfunction
P0531	A/C Refrigerant Pressure Sensor Circuit Range/Performance
P0532	A/C Refrigerant Pressure Sensor Circuit Low Input
P0533	A/C Refrigerant Pressure Sensor Circuit High Input
P0534	Air Conditioner Refrigerant Charge Loss
P0550	Power Steering Pressure Sensor Circuit Malfunction
P0551	Power Steering Pressure Sensor Circuit Range/Performance
P0552	Power Steering Pressure Sensor Circuit Low Input
P0553	Power Steering Pressure Sensor Circuit High Input
P0554	Power Steering Pressure Sensor Circuit Intermittent
P0560	System Voltage Malfunction
P0561	System Voltage Unstable
P0562	System Voltage Low
P0563	System Voltage High
P0565	Cruise Control On Signal Malfunction
P0566	Cruise Control Off Signal Malfunction
P0567	Cruise Control Resume Signal Malfunction
P0568	Cruise Control Set Signal Malfunction
P0569	Cruise Control Coast Signal Malfunction
P0570	Cruise Control Accel Signal Malfunction
P0571	Cruise Control/Brake Switch A Circuit Malfunction
P0572	Cruise Control/Brake Switch A Circuit Low
P0573	Cruise Control/Brake Switch A Circuit High
P0574	Cruise Control Related Malfunction
P0575	Cruise Control Related Malfunction
P0576	Cruise Control Related Malfunction
P0576	Cruise Control Related Malfunction
P0578	Cruise Control Related Malfunction
P0579	Cruise Control Related Malfunction
P0580	Cruise Control Related Malfunction

A malfunctioning vehicle speed sensor, for example, can affect the accuracy of the speedometer, anti-lock braking system (ABS), and electronic stability control (ESC), according to the National Highway Traffic Safety Administration (NHTSA, Vehicle Safety Systems, 2022). Addressing these issues promptly ensures that these safety systems function correctly, reducing the risk of accidents. CARDIAGTECH.NET offers tools that can help you diagnose and resolve these sensor-related problems effectively.

2.5. P0600 Series Mercedes Fault Codes Meaning

What do P0600 series Mercedes fault codes indicate, and how can they be resolved to ensure proper functioning of the vehicle’s control modules?

The P0600 series Mercedes fault codes typically indicate issues within the vehicle’s control modules, which can affect various systems, including the engine, transmission, and other critical functions. Addressing these codes promptly is crucial for maintaining the proper functioning of the vehicle.

Mercedes Fault Code	Fault Code Meaning
P0600	Serial Communication Link Malfunction
P0601	Internal Control Module Memory Check Sum Error
P0602	Control Module Programming Error
P0603	Internal Control Module Keep Alive Memory (KAM) Error
P0604	Internal Control Module Random Access Memory (RAM) Error
P0605	Internal Control Module Read Only Memory (ROM) Error
P0606	PCM Processor Fault
P0608	Control Module VSS Output “A” Malfunction
P0609	Control Module VSS Output “B” Malfunction
P0620	Generator Control Circuit Malfunction
P0621	Generator Lamp “L” Control Circuit Malfunction
P0622	Generator Field “F” Control Circuit Malfunction
P0650	Malfunction Indicator Lamp (MIL) Control Circuit Malfunction
P0654	Engine RPM Output Circuit Malfunction
P0655	Engine Hot Lamp Output Control Circuit Malfunction
P0656	Fuel Level Output Circuit Malfunction

According to a technical report by Bosch, control module failures can result in a wide range of performance issues, from reduced engine power to complete system shutdowns (Bosch, Automotive Control Systems, 2019). Accurate diagnostics are essential to determine whether the control module needs reprogramming or replacement. CARDIAGTECH.NET provides professional-grade tools capable of performing these advanced diagnostics and repairs, ensuring your Mercedes operates smoothly.

2.6. P0700 Series Mercedes Fault Codes Meaning

What issues are indicated by the P0700 series Mercedes fault codes, and how can they be resolved to ensure smooth and reliable transmission operation?

The P0700 series Mercedes fault codes generally pertain to issues within the transmission system, including problems with the transmission control system, solenoids, and fluid temperature sensors. Addressing these codes promptly is critical for ensuring smooth and reliable transmission operation.

Mercedes Fault Code	Fault Code Meaning
P0700	Transmission Control System Malfunction
P0701	Transmission Control System Range/Performance
P0702	Transmission Control System Electrical
P0703	Torque Converter/Brake Switch B Circuit Malfunction
P0704	Clutch Switch Input Circuit Malfunction
P0705	Transmission Range Sensor Circuit malfunction (PRNDL Input)
P0706	Transmission Range Sensor Circuit Range/Performance
P0707	Transmission Range Sensor Circuit Low Input
P0708	Transmission Range Sensor Circuit High Input
P0709	Transmission Range Sensor Circuit Intermittent
P0710	Transmission Fluid Temperature Sensor Circuit Malfunction
P0711	Transmission Fluid Temperature Sensor Circuit Range/Performance
P0712	Transmission Fluid Temperature Sensor Circuit Low Input
P0713	Transmission Fluid Temperature Sensor Circuit High Input
P0714	Transmission Fluid Temperature Sensor Circuit Intermittent
P0715	Input/Turbine Speed Sensor Circuit Malfunction
P0716	Input/Turbine Speed Sensor Circuit Range/Performance
P0717	Input/Turbine Speed Sensor Circuit No Signal
P0718	Input/Turbine Speed Sensor Circuit Intermittent
P0719	Torque Converter/Brake Switch B Circuit Low
P0720	Output Speed Sensor Circuit Malfunction
P0721	Output Speed Sensor Range/Performance
P0722	Output Speed Sensor No Signal
P0723	Output Speed Sensor Intermittent
P0724	Torque Converter/Brake Switch B Circuit High
P0725	Engine Speed input Circuit Malfunction
P0726	Engine Speed Input Circuit Range/Performance
P0727	Engine Speed Input Circuit No Signal
P0728	Engine Speed Input Circuit Intermittent
P0730	Incorrect Gear Ratio
P0731	Gear 1 Incorrect Ratio
P0732	Gear 2 Incorrect Ratio
P0733	Gear 3 Incorrect Ratio
P0734	Gear 4 Incorrect Ratio
P0735	Gear 5 Incorrect Ratio
P0736	Reverse Incorrect Gear Ratio
P0740	Torque Converter Clutch Circuit Malfuction
P0741	Torque Converter Clutch Circuit Performance or Stuck Off
P0742	Torque Converter Clutch Circuit Stuck On
P0743	Torque Converter Clutch Circuit Electrical
P0744	Torque Converter Clutch Circuit Intermittent
P0745	Pressure Control Solenoid Malfunction
P0746	Pressure Control Solenoid Performance or Stuck Off
P0747	Pressure Control Solenoid Stuck On
P0748	Pressure Control Solenoid Electrical
P0749	Pressure Control Solenoid Intermittent
P0750	Shift Solenoid A Malfunction
P0751	Shift Solenoid A Performance or Stuck Off
P0752	Shift Solenoid A Stuck On
P0753	Shift Solenoid A Electrical
P0754	Shift Solenoid A Intermittent
P0755	Shift Solenoid B Malfunction
P0756	Shift Solenoid B Performance or Stuck Off
P0757	Shift Solenoid B Stuck On
P0758	Shift Solenoid B Electrical
P0759	Shift Solenoid B Intermittent
P0760	Shift Solenoid C Malfunction
P0761	Shift Solenoid C Performance or Stuck Off
P0762	Shift Solenoid C Stuck On
P0763	Shift Solenoid C Electrical
P0764	Shift Solenoid C Intermittent
P0765	Shift Solenoid D Malfunction
P0766	Shift Solenoid D Performance or Stuck Off
P0767	Shift Solenoid D Stuck On
P0768	Shift Solenoid D Electrical
P0769	Shift Solenoid D Intermittent
P0770	Shift Solenoid E Malfunction
P0771	Shift Solenoid E Performance or Stuck Off
P0772	Shift Solenoid E Stuck On
P0773	Shift Solenoid E Electrical
P0774	Shift Solenoid E Intermittent
P0780	Shift Malfunction
P0781	1-2 Shift Malfunction
P0782	2-3 Shift Malfunction
P0783	3-4 Shift Malfunction
P0784	4-5 Shift Malfunction
P0785	Shift/Timing Solenoid Malfunction
P0786	Shift/Timing Solenoid Range/Performance
P0787	Shift/Timing Solenoid Low
P0788	Shift/Timing Solenoid High
P0789	Shift/Timing Solenoid Intermittent
P0790	Normal/Performance Switch Circuit Malfunction

According to the Automatic Transmission Rebuilders Association (ATRA), transmission issues can lead to poor fuel economy, rough shifting, and even complete transmission failure (ATRA, Transmission Problems, 2021). Diagnosing these issues accurately and performing necessary repairs or replacements can extend the life of your transmission and ensure a comfortable driving experience. CARDIAGTECH.NET offers diagnostic tools that provide detailed insights into your transmission’s condition, helping you address problems effectively.

2.7. P0800 Series Mercedes Fault Codes Meaning

What do P0800 series Mercedes fault codes indicate, and how can they be resolved to ensure proper functioning of the vehicle’s transmission and clutch systems?

The P0800 series Mercedes fault codes generally indicate issues within the transmission and clutch systems, including problems with the control circuits, position sensors, and switches. Addressing these codes promptly is essential for maintaining the proper functioning of these critical systems.

Mercedes Fault Code	Fault Code Meaning
P0801	Reverse Inhibit Control Circuit Malfunction
P0803	1-4 Upshift (Skip Shift) Solenoid Control Circuit Malfunction
P0804	1-4 Upshift (Skip Shift) Lamp Control Circuit Malfunction
P0805	Clutch Position Sensor Circuit Malfunction
P0806	Clutch Position Sensor Circuit Range/Performance
P0807	Clutch Position Sensor Circuit Low
P0808	Clutch Position Sensor Circuit High
P0809	Clutch Position Sensor Circuit Intermittent Ckt
P0810	Clutch Position Control Malfunction
P0811	Clutch Slippage Excessive
P0812	Reverse Input Circuit Malfunction
P0813	Reverse Output Circuit Malfunction
P0814	Trans Range Display Circuit Malfunction
P0815	Upshift Switch Circuit Malfunction
P0816	Downshift Switch Circuit Malfunction
P0817	Starter Disable Circuit
P0818	Driveline Disconn. Switch Input
P0820	Gear Lever X-Y Sensor Circuit
P0821	Gear Lever X Sensor Circuit
P0822	Gear Lever Y Sensor Circuit
P0823	Gear Lever X Sensor Circuit Intermittent Ckt
P0824	Gear Lever Y Sensor Circuit Intermittent Ckt
P0830	Clutch Position Switch A Circuit Malfunction
P0831	Clutch Position Switch A Circuit Low
P0832	Clutch Position Switch A Circuit High
P0833	Clutch Position Switch B Circuit Malfunction
P0834	Clutch Position Switch B Circuit Low
P0835	Clutch Position Switch B Circuit High
P0836	4 Wheel Drive Switch Circuit Malfunction
P0837	4 Wheel Drive Switch CKT Range/Perf
P0838	4 Wheel Drive Switch Circuit Low
P0839	4 Wheel Drive Switch Circuit High
P0840	Trans Fluid Press Sensor/Switch A Circuit Malfunction
P0841	Trans Fluid Press Sensor/Switch A CKT Range/Perf
P0842	Trans Fluid Press Sensor/Switch A Circuit Low
P0843	Trans Fluid Press Sensor/Switch A Circuit High
P0844	Trans Fluid Press Sensor/Switch A CKT Intermittent
P0845	Trans Fluid Press Sensor/Switch B Circuit Malfunction
P0846	Trans Fluid Press Sensor/Switch B CKT Range/Perf
P0847	Trans Fluid Press Sensor/Switch B Circuit Low
P0848	Trans Fluid Press Sensor/Switch B Circuit High
P0849	Trans Fluid Press Sensor/Switch B CKT Intermittent

According to a study by the University of Michigan Transportation Research Institute, clutch and transmission issues can significantly impact vehicle safety and performance (UMTRI, Vehicle Safety Research, 2020). Accurate diagnostics and timely repairs of these systems ensure a safe and smooth driving experience. CARDIAGTECH.NET provides diagnostic tools that offer detailed insights into these systems, helping you address problems efficiently and effectively.

2.8. P1000-P2000 Series Fault Codes Meaning

What do P1000-P2000 series Mercedes fault codes indicate, and how can they be resolved to ensure optimal engine performance and emissions control?

The P1000-P2000 series Mercedes fault codes cover a wide range of engine and emissions-related issues, including problems with the fuel system, air intake, and exhaust. Addressing these codes promptly is essential for maintaining optimal engine performance and controlling emissions.

Mercedes Fault Code	Fault Code Meaning
P1000	Electronic Gear Selector Module: Defective N15/5
P1228	yet unknown code on 1997 C 220 CDI
P1386	knock control
P1570	Intermittant No-Start Immobiliser Module
P1747	Electronic Gear Selector Module: Defective Interaction of CAN with control unit A1(instrument cluster)
P1750	Electronic Gear Selector Module: Very low control unit supply voltage
P1832	Electronic Gear Selector Module: SHORT in circuit N15/5 output stage
P1910	Electronic Gear Selector Module: Control Unit over voltage
P1912	Electronic Gear Selector Module: Weak touch push button voltage
P2000	NOx Trap Efficiency Below Threshold (Bank 1)
P2001	NOx Trap Efficiency Below Threshold (Bank 2)
P2003	Particulate Trap Efficiency Below Threshold (Bank 1)
P2004	Particulate Trap Efficiency Below Threshold (Bank 2)
P2031	Exhaust Gas Temperature Sensor Circuit (Bank 1 Sensor 2)
P2032	Exhaust Gas Temperature Sensor Circuit Low (Bank 1 Sensor 2)
P2033	Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 2)
P2080	Exhaust Gas Temperature Sensor Circuit Range/Performance (Bank 1 Sensor 1)
P2081	Exhaust Gas Temperature Sensor Circuit intermittant (Bank 1 Sensor 1)
P2100	Throttle Actuator Control Motor Circuit/Open
P2101	Throttle Actuator Control Motor Circuit Range/Performance
P2208	transmission: The speed of Y3/6n2 to Y3/6n3 is excessive

According to the California Air Resources Board (CARB), maintaining proper engine performance and emissions control is crucial for reducing air pollution and meeting environmental standards (CARB, Vehicle Emissions Testing, 2021). Regularly diagnosing and addressing issues indicated by these fault codes ensures your Mercedes complies with regulations and operates efficiently. CARDIAGTECH.NET offers a range of diagnostic tools to help you identify and resolve these issues effectively.

2.9. Mercedes Body Fault Codes

What do Mercedes body fault codes indicate, and how can they be resolved to ensure the proper functioning of various vehicle systems related to comfort, convenience, and safety?

Mercedes body fault codes indicate issues within the vehicle’s body systems, including components related to comfort, convenience, and safety, such as lighting, climate control, and airbag systems. Addressing these codes promptly is essential for maintaining the overall functionality and safety of the vehicle.

Mercedes Fault Code	Fault Code Meaning
B1000	HRA Headlamp range adjustment: Supply voltage of the control unit is too low (undervoltage)
B1004	LCP Lower Control Panel: Control unit does not match vehicle type
B1056	Automatic Air Conditioning: Problem in CAN communication with control unit DCM-RL
B1201	Electric seat adjustment front left: Hall sensor front height M27m3
B1213	If seat memory installed: ext right rearview mirror voltage faulty
B1214	If seat memory installed: ext right rearview mirror voltage faulty
B1226	In-car temperature sensor (B10/4)
B1227	Outside temperature indicator temp sensor (014)
B1128	Heater core temperature (B10/1)
B1229	Heater core temperature (B10/1)
B1230	Evaporator temperature sensor (B10/6)
B1231	ECT sensor (B11/4)
B1232	Refrigerant pressure sensor (B12)
B1233	Refrigerant temperature sensor (B12/1)
B1234	Sun sensor (B32)
B1235	Emissions sensor (B31)
B1241	Refrigerant Fill
B1246	PTS Parktronic: A42b1 (left outer sensor, front bumper) The plug connection has poor contact or is loose, or the sensor or cable is faulty
B1310	Left/Window airbag sensor is defective
B1315	Problem in Front passenger child seat recognition
B1416	Coolant circulation pump (M13)
B1417	Duovalve (Y21y1), left
B1418	Duovalve (Y21y2), right
B1419	Electromagnetic clutch (A9k1)
B1420	Idle speed increase
B1421	Pulse module (N05)
B1422	Series interface (K1) connection to instrument cluster (A1)
B1423	Switchover valve block (Y11)
B1424	Activated charcoal filler actuator (A32m2) open
B1425	Activated charcoal filler actuator (A32m2) closed
B1432	Non-USA DTC
B1459	Series interface (K2) connection to instrument cluster (A1)
B1462	Wide open throttle (WOT) position signal diesel engines
B1476	Airbag malfunction indicator and warning lamp is defective
B1481	HRA: Part E2m1 (Right headlamp range adjustment motor) has short to ground
B1489	HRA: Part E2m1 (Right headlamp range adjustment motor) has open or short to positive
B1492	HRA: Part E1m1 (Left headlamp range adjustement motor) has short to positive/td>
B1617	Part E19/1 (Left license plate lamp) is defective
B1618	Part E19/2 (Right license plate lamp) is defective
B1628	Part E2e5 (Turn signal lamp) in module E2 (Right front headlamp unit) is defective.
B1703	Intermittant No Start in AAM Immobiliser Module
B1729	PSE Pneumatic system doorlock Control Module A37
B1736	Navigation system’s CD Player: Check General CD, Check CD data block, Flimsy CD data
B1768	Faulty open data flap limit switch (0025) Front flap
B1773	HRA: Zero position programming has not yet been carried out or is not possible
B1850	Electric seat adjustment front right: CAN communication interrupted with DCMC1000 Traction System Control Module

According to a report by the Insurance Institute for Highway Safety (IIHS), functioning safety systems, such as airbags and lighting, are critical for reducing the risk of accidents and injuries (IIHS, Vehicle Safety Features, 2022). Regular diagnostics and repairs of body-related systems ensure these safety features operate correctly. CARDIAGTECH.NET offers diagnostic tools that can help you identify and resolve these issues, enhancing the safety and comfort