Common Mercedes Fault Codes That Trigger Your Warning Lights

Mercedes builds some of the most advanced vehicles on the road. To keep everything running smoothly, Mercedes' onboard computers monitor hundreds of individual systems, sensors and variables and make corrections as necessary to optimize performance, shifting, braking, traction, stability, safety and other vehicle parameters. When anything goes wrong, your Mercedes registers the error or deviation and produces a fault code.

Fault codes happening within your Mercedes trigger dash lights (such as ‘Check Engine,' ‘Brake' or ‘Temperature'), but this often isn't enough information for the average Mercedes owner to properly diagnose the cause of the problem.

You should always take these warning lights on your dash seriously and immediately bring your car or sprinter to a Mercedes specialist repair shop such as Burdi Motorworks here in Chicago whenever a warning light comes on. In some cases, there might be a simple fix (such as correcting a low fluid level, tightening your gas cap or cleaning a sensor), while in other cases your Mercedes may require additional service or repairs.

What is a Fault Code?

A fault code, or Diagnostic Trouble Code (DTC) are system code errors that tell your Mercedes what is malfunctioning.

In newer Mercedes models, the fault code will trigger a dash light or error message, alerting you to get your Mercedes inspected and diagnosed.

P0400s | P0500s | P0600s | P0700s | P0800s | P1000s-P2000s | Body (B####) | C#### | U####

Common Mercedes Error Messages – Explained:

Mercedes Fault Code: P261F71

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

Mercedes Fault Code: P126A00
OM642 Engine oil cooler leak

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

Bring Your Car to Burdi to Get Your Mercedes Diagnosed, Today

Thanks to the error codes recorded by your onboard computer, our trained technicians can quickly determine what is wrong. When you bring your vehicle to us, we start by hooking our diagnostic equipment up to your ODB-II port and reading all registered error codes. While all automakers use a common language for error codes, each one has specific definitions.

That's where our experience with Mercedes Benz vehicles and our advanced diagnostics equipment is critical. Our experienced technicians can read all of your error codes (both current and previous) and plan the necessary service to get your Mercedes running perfectly again. We can also reset error codes and see if they come on again, which can be a sign that a temporary problem has been fixed (such as low oil, bad gas or dirty sensors) or that a problem is intermittent and appears again after a short time.

All of this error code information points us to the root cause of your Mercedes issues and guides us to the right repairs. We only do what is necessary and always get your approval before starting service. This is how we've built our reputation as a leader in Mercedes Benz maintenance, repair and service in the Chicago area. We invite you to visit our facility in Schiller Park to talk to us in person. You can also contact us online or by phone to schedule a service appointment.

Our experienced team will do what it takes to get your Mercedes or Sprinter back where it belongs: on the road! We've listed all of the Mercedes fault codes and their explanations to help you understand what's going on with your vehicle if you have your own scanner and want to learn more about Mercedes fault codes.

What Does This Mercedes Fault Code Mean?

P0400 Mercedes Fault Codes Meaning

Mercedes Fault CodeFault Code Meaning
P0466Purge Flow Sensor Circuit Range/Performance
P0467Purge Flow Sensor Circuit Low Input
P0468Purge Flow Sensor Circuit High Input
P0469Purge Flow Sensor Circuit Intermittent
P0470Exhaust Pressure Sensor Malfunction
P0471Exhaust Pressure Sensor Range/Performance
P0472Exhaust Pressure Sensor Low
P0473Exhaust Pressure Sensor High
P0474Exhaust Pressure Sensor Intermittent
P0475Exhaust Pressure Control Valve Malfunction
P0476Exhaust Pressure Control Valve Range/Performance
P0477Exhaust Pressure Control Valve Low
P0478Exhaust Pressure Control Valve High
P0479Exhaust Pressure Control Valve Intermittent
P0480Cooling Fan 1 Control Circuit Malfunction
P0481Cooling Fan 2 Control Circuit Malfunction
P0482Cooling Fan 3 Control Circuit Malfunction
P0483Cooling Fan Rationality Check Malfunction
P0484Cooling Fan Circuit Over Current
P0485Cooling Fan Power/Ground Circuit Malfunction

P0500 Mercedes Fault Codes Meaning

Mercedes Fault CodeFault Code Meaning
P0500Vehicle Speed Sensor Malfunction
P0501Vehicle Speed Sensor Range/Performance
P0502Vehicle Speed Sensor Low Input
P0503Vehicle Speed Sensor Intermittent/Erratic/High
P0505Idle Control System Malfunction
P0506Idle Control System RPM Lower Than Expected
P0507Idle Control System RPM Higher Than Expected
P0510Closed Throttle Position Switch Malfunction
P0520Engine Oil Pressure Sensor/Switch Circuit Malfunction
P0521Engine Oil Pressure Sensor/Switch Circuit Range/Performance
P0522Engine Oil Pressure Sensor/Switch Circuit Low Voltage
P0523Engine Oil Pressure Sensor/Switch Circuit High Voltage
P0530A/C Refrigerant Pressure Sensor Circuit Malfunction
P0531A/C Refrigerant Pressure Sensor Circuit Range/Performance
P0532A/C Refrigerant Pressure Sensor Circuit Low Input
P0533A/C Refrigerant Pressure Sensor Circuit High Input
P0534Air Conditioner Refrigerant Charge Loss
P0550Power Steering Pressure Sensor Circuit Malfunction
P0551Power Steering Pressure Sensor Circuit Range/Performance
P0552Power Steering Pressure Sensor Circuit Low Input
P0553Power Steering Pressure Sensor Circuit High Input
P0554Power Steering Pressure Sensor Circuit Intermittent
P0560System Voltage Malfunction
P0561System Voltage Unstable
P0562System Voltage Low
P0563System Voltage High
P0565Cruise Control On Signal Malfunction
P0566Cruise Control Off Signal Malfunction
P0567Cruise Control Resume Signal Malfunction
P0568Cruise Control Set Signal Malfunction
P0569Cruise Control Coast Signal Malfunction
P0570Cruise Control Accel Signal Malfunction
P0571Cruise Control/Brake Switch A Circuit Malfunction
P0572Cruise Control/Brake Switch A Circuit Low
P0573Cruise Control/Brake Switch A Circuit High
P0574Cruise Control Related Malfunction
P0575Cruise Control Related Malfunction
P0576Cruise Control Related Malfunction
P0576Cruise Control Related Malfunction
P0578Cruise Control Related Malfunction
P0579Cruise Control Related Malfunction
P0580Cruise Control Related Malfunction

P0600 Mercedes Fault Codes Meaning

Mercedes Fault CodeFault Code Meaning
P0600Serial Communication Link Malfunction
P0601Internal Control Module Memory Check Sum Error
P0602Control Module Programming Error
P0603Internal Control Module Keep Alive Memory (KAM) Error
P0604Internal Control Module Random Access Memory (RAM) Error
P0605Internal Control Module Read Only Memory (ROM) Error
P0606PCM Processor Fault
P0608Control Module VSS Output “A” Malfunction
P0609Control Module VSS Output “B” Malfunction
P0620Generator Control Circuit Malfunction
P0621Generator Lamp “L” Control Circuit Malfunction
P0622Generator Field “F” Control Circuit Malfunction
P0650Malfunction Indicator Lamp (MIL) Control Circuit Malfunction
P0654Engine RPM Output Circuit Malfunction
P0655Engine Hot Lamp Output Control Circuit Malfunction
P0656Fuel Level Output Circuit Malfunction

P0700 Mercedes Fault Codes Meaning

Mercedes Fault CodeFault Code Meaning
P0700Transmission Control System Malfunction
P0701Transmission Control System Range/Performance
P0702Transmission Control System Electrical
P0703Torque Converter/Brake Switch B Circuit Malfunction
P0704Clutch Switch Input Circuit Malfunction
P0705Transmission Range Sensor Circuit malfunction (PRNDL Input)
P0706Transmission Range Sensor Circuit Range/Performance
P0707Transmission Range Sensor Circuit Low Input
P0708Transmission Range Sensor Circuit High Input
P0709Transmission Range Sensor Circuit Intermittent
P0710Transmission Fluid Temperature Sensor Circuit Malfunction
P0711Transmission Fluid Temperature Sensor Circuit Range/Performance
P0712Transmission Fluid Temperature Sensor Circuit Low Input
P0713Transmission Fluid Temperature Sensor Circuit High Input
P0714Transmission Fluid Temperature Sensor Circuit Intermittent
P0715Input/Turbine Speed Sensor Circuit Malfunction
P0716Input/Turbine Speed Sensor Circuit Range/Performance
P0717Input/Turbine Speed Sensor Circuit No Signal
P0718Input/Turbine Speed Sensor Circuit Intermittent
P0719Torque Converter/Brake Switch B Circuit Low
P0720Output Speed Sensor Circuit Malfunction
P0721Output Speed Sensor Range/Performance
P0722Output Speed Sensor No Signal
P0723Output Speed Sensor Intermittent
P0724Torque Converter/Brake Switch B Circuit High
P0725Engine Speed input Circuit Malfunction
P0726Engine Speed Input Circuit Range/Performance
P0727Engine Speed Input Circuit No Signal
P0728Engine Speed Input Circuit Intermittent
P0730Incorrect Gear Ratio
P0731Gear 1 Incorrect Ratio
P0732Gear 2 Incorrect Ratio
P0733Gear 3 Incorrect Ratio
P0734Gear 4 Incorrect Ratio
P0735Gear 5 Incorrect Ratio
P0736Reverse Incorrect Gear Ratio
P0740Torque Converter Clutch Circuit Malfuction
P0741Torque Converter Clutch Circuit Performance or Stuck Off
P0742Torque Converter Clutch Circuit Stuck On
P0743Torque Converter Clutch Circuit Electrical
P0744Torque Converter Clutch Circuit Intermittent
P0745Pressure Control Solenoid Malfunction
P0746Pressure Control Solenoid Performance or Stuck Off
P0747Pressure Control Solenoid Stuck On
P0748Pressure Control Solenoid Electrical
P0749Pressure Control Solenoid Intermittent
P0750Shift Solenoid A Malfunction
P0751Shift Solenoid A Performance or Stuck Off
P0752Shift Solenoid A Stuck On
P0753Shift Solenoid A Electrical
P0754Shift Solenoid A Intermittent
P0755Shift Solenoid B Malfunction
P0756Shift Solenoid B Performance or Stuck Off
P0757Shift Solenoid B Stuck On
P0758Shift Solenoid B Electrical
P0759Shift Solenoid B Intermittent
P0760Shift Solenoid C Malfunction
P0761Shift Solenoid C Performance or Stuck Off
P0762Shift Solenoid C Stuck On
P0763Shift Solenoid C Electrical
P0764Shift Solenoid C Intermittent
P0765Shift Solenoid D Malfunction
P0766Shift Solenoid D Performance or Stuck Off
P0767Shift Solenoid D Stuck On
P0768Shift Solenoid D Electrical
P0769Shift Solenoid D Intermittent
P0770Shift Solenoid E Malfunction
P0771Shift Solenoid E Performance or Stuck Off
P0772Shift Solenoid E Stuck On
P0773Shift Solenoid E Electrical
P0774Shift Solenoid E Intermittent
P0780Shift Malfunction
P07811-2 Shift Malfunction
P07822-3 Shift Malfunction
P07833-4 Shift Malfunction
P07844-5 Shift Malfunction
P0785Shift/Timing Solenoid Malfunction
P0786Shift/Timing Solenoid Range/Performance
P0787Shift/Timing Solenoid Low
P0788Shift/Timing Solenoid High
P0789Shift/Timing Solenoid Intermittent
P0790Normal/Performance Switch Circuit Malfunction

P0800 Mercedes Fault Codes Meaning

Mercedes Fault CodeFault Code Meaning
P0801Reverse Inhibit Control Circuit Malfunction
P08031-4 Upshift (Skip Shift) Solenoid Control Circuit Malfunction
P08041-4 Upshift (Skip Shift) Lamp Control Circuit Malfunction
P0805Clutch Position Sensor Circuit Malfunction
P0806Clutch Position Sensor Circuit Range/Performance
P0807Clutch Position Sensor Circuit Low
P0808Clutch Position Sensor Circuit High
P0809Clutch Position Sensor Circuit Intermittent Ckt
P0810Clutch Position Control Malfunction
P0811Clutch Slippage Excessive
P0812Reverse Input Circuit Malfunction
P0813Reverse Output Circuit Malfunction
P0814Trans Range Display Circuit Malfunction
P0815Upshift Switch Circuit Malfunction
P0816Downshift Switch Circuit Malfunction
P0817Starter Disable Circuit
P0818Driveline Disconn. Switch Input
P0820Gear Lever X-Y Sensor Circuit
P0821Gear Lever X Sensor Circuit
P0822Gear Lever Y Sensor Circuit
P0823Gear Lever X Sensor Circuit Intermittent Ckt
P0824Gear Lever Y Sensor Circuit Intermittent Ckt
P0830Clutch Position Switch A Circuit Malfunction
P0831Clutch Position Switch A Circuit Low
P0832Clutch Position Switch A Circuit High
P0833Clutch Position Switch B Circuit Malfunction
P0834Clutch Position Switch B Circuit Low
P0835Clutch Position Switch B Circuit High
P08364 Wheel Drive Switch Circuit Malfunction
P08374 Wheel Drive Switch CKT Range/Perf
P08384 Wheel Drive Switch Circuit Low
P08394 Wheel Drive Switch Circuit High
P0840Trans Fluid Press Sensor/Switch A Circuit Malfunction
P0841Trans Fluid Press Sensor/Switch A CKT Range/Perf
P0842Trans Fluid Press Sensor/Switch A Circuit Low
P0843Trans Fluid Press Sensor/Switch A Circuit High
P0844Trans Fluid Press Sensor/Switch A CKT Intermittent
P0845Trans Fluid Press Sensor/Switch B Circuit Malfunction
P0846Trans Fluid Press Sensor/Switch B CKT Range/Perf
P0847Trans Fluid Press Sensor/Switch B Circuit Low
P0848Trans Fluid Press Sensor/Switch B Circuit High
P0849Trans Fluid Press Sensor/Switch B CKT Intermittent

P1000-P2000 Fault Codes Meaning

Mercedes Fault CodeFault Code Meaning
P1000Electronic Gear Selector Module: Defective N15/5
P1228yet unknown code on 1997 C 220 CDI
P1386knock control
P1570Intermittant No-Start Immobiliser Module
P1747Electronic Gear Selector Module: Defective Interaction of CAN
with control unit A1(instrument cluster)
P1750Electronic Gear Selector Module: Very low control unit supply
P1832Electronic Gear Selector Module: SHORT in circuit N15/5 output
P1910Electronic Gear Selector Module: Control Unit over voltage
P1912Electronic Gear Selector Module: Weak touch push button voltage
P2000NOx Trap Efficiency Below Threshold (Bank 1)
P2001NOx Trap Efficiency Below Threshold (Bank 2)
P2003Particulate Trap Efficiency Below Threshold (Bank 1)
P2004Particulate Trap Efficiency Below Threshold (Bank 2)
P2031Exhaust Gas Temperature Sensor Circuit (Bank 1 Sensor 2)
P2032Exhaust Gas Temperature Sensor Circuit Low (Bank 1 Sensor 2)
P2033Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 2)
P2080Exhaust Gas Temperature Sensor Circuit Range/Performance (Bank 1
Sensor 1)
P2081Exhaust Gas Temperature Sensor Circuit intermittant (Bank 1 Sensor
P2100Throttle Actuator Control Motor Circuit/Open
P2101Throttle Actuator Control Motor Circuit Range/Performance
P2208transmission: The speed of Y3/6n2 to Y3/6n3 is excessive


Mercedes Body Fault Codes

Mercedes Fault CodeFault Code Meaning
B1000HRA Headlamp range adjustment: Supply voltage of the control unit is too low (undervoltage)
B1004LCP Lower Control Panel: Control unit does not match vehicle type
B1056Automatic Air Conditioning: Problem in CAN communication with control unit DCM-RL
B1201Electric seat adjustment front left: Hall sensor front height M27m3
B1213If seat memory installed: ext right rearview mirror voltage faulty
B1214If seat memory installed: ext right rearview mirror voltage faulty
B1226In-car temperature sensor (B10/4)
B1227Outside temperature indicator temp sensor (014)
B1128Heater core temperature (B10/1)
B1229Heater core temperature (B10/1)
B1230Evaporator temperature sensor (B10/6)
B1231ECT sensor (B11/4)
B1232Refrigerant pressure sensor (B12)
B1233Refrigerant temperature sensor (B12/1)
B1234Sun sensor (B32)
B1235Emissions sensor (B31)
B1241Refrigerant Fill
B1246PTS Parktronic: A42b1 (left outer sensor, front bumper) The plug connection has poor contact or is loose, or the sensor or cable is faulty
B1310Left/Window airbag sensor is defective
B1315Problem in Front passenger child seat recognition
B1416Coolant circulation pump (M13)
B1417Duovalve (Y21y1), left
B1418Duovalve (Y21y2), right
B1419Electromagnetic clutch (A9k1)
B1420Idle speed increase
B1421Pulse module (N05)
B1422Series interface (K1) connection to instrument cluster (A1)
B1423Switchover valve block (Y11)
B1424Activated charcoal filler actuator (A32m2) open
B1425Activated charcoal filler actuator (A32m2) closed
B1432Non-USA DTC
B1459Series interface (K2) connection to instrument cluster (A1)
B1462Wide open throttle (WOT) position signal diesel engines
B1476Airbag malfunction indicator and warning lamp is defective
B1481HRA: Part E2m1 (Right headlamp range adjustment motor) has short to ground
B1489HRA: Part E2m1 (Right headlamp range adjustment motor) has open or short to positive
B1492HRA: Part E1m1 (Left headlamp range adjustement motor) has short to positive/td>
B1617Part E19/1 (Left license plate lamp) is defective
B1618Part E19/2 (Right license plate lamp) is defective
B1628Part E2e5 (Turn signal lamp) in module E2 (Right front headlamp unit) is defective.
B1703Intermittant No Start in AAM Immobiliser Module
B1729PSE Pneumatic system doorlock Control Module A37
B1736Navigation system's CD Player: Check General CD, Check CD data block, Flimsy CD data
B1768Faulty open data flap limit switch (0025) Front flap
B1773HRA: Zero position programming has not yet been carried out or is not possible
B1850Electric seat adjustment front right: CAN communication interrupted with DCMC1000 Traction System Control Module


Mercedes C-Level Fault Codes

Mercedes Fault CodeFault Code Meaning
C1010Battery Voltage Low
C1011ASR/ETS/ESP Circuit Open or Shorted
C1012Battery Voltage High
C1020CAN Communication Fault
C1021CAN Communication With EA/CC/ISC Control Module Interrupted
C1024CAN Communication With Engine Control Module Interrupted
C1025CAN Communication BAS communication with ESP control unit faulty
C1100Left Front Axle VSS Circuit Fault
C1101Right Front Axle VSS Circuit Fault
C1102ETS/ASR, ABS Left Axle VSS Circuit Fault
C1103Right Rear Axle VSS Circuit Fault
C1121AIRmatic: fault in component B22/3 (level sensor)
C1122AIRmatic: fault in component B22/4 (level sensor)
C1123AIRmatic: fault in component B22/6 (level sensor)
C1132AIRmatic: fault in component B22/8 (level sensor)
C1133AIRmatic: fault in component B22/9 (level sensor)
C1135AIRmatic: fault in component B22/3 (level sensor)
C1140BAS light, play in steering column causes steering angle sensor to
lose memory(?)
C1142ABS Lateral Acceleration Sensor Open/Shorted
C1144AIRmatic: fault in component B7 (pressure sensor)
C1200Stop Light Switch Open/Shorted/Implausible
C1300Left Front Axle Solenoid Valve (Hold) (A7/3y6) Open/Shorted
C1303Right Front Axle Solenoid Valve (Hold) Open/Shorted
C1311Switchover Solenoid Valve (Release) Open/Shorted
C1312Master Cylinder Switchover Valve
C1401High Pressure Return Pump Circuit Open/Shorted; Will Not Shut Off
C1501SPS P-Valve
C1504BAS light, play in steering column causes steering angle sensor to lose memory(?)
C1512Brakes Overheated
C1600Temperature After Engine Is Turned OffU0001 High Speed CAN Communication Bus


Mercedes U0 Codes

Mercedes Fault CodeFault Code Meaning
U0002High Speed CAN Communication Bus Performance
U0003High Speed CAN Communication Bus (+) open
U0004High Speed CAN Communication Bus (+) low
U0005High Speed CAN Communication Bus (+) high
U0006High Speed CAN Communication Bus (-) open
U0007High Speed CAN Communication Bus (-) low
U0008High Speed CAN Communication Bus (-) high
U0009High Speed CAN Communication Bus (-) shorted to Bus (+)
U0010Medium Speed CAN Communication Bus
U0011Medium Speed CAN Communication Bus Performance
U0012Medium Speed CAN Communication Bus (+) open
U0013Medium Speed CAN Communication Bus (+) low
U0014Medium Speed CAN Communication Bus (+) high
U0015Medium Speed CAN Communication Bus (-) open
U0016Medium Speed CAN Communication Bus (-) low
U0017Medium Speed CAN Communication Bus (-) high
U0018Medium Speed CAN Communication Bus (-) shorted to Bus (+)
U0019Low Speed CAN Communication Bus
U0020Low Speed CAN Communication Bus Performance
U0021Low Speed CAN Communication Bus (+) open
U0022Low Speed CAN Communication Bus (+) low
U0023Low Speed CAN Communication Bus (+) high
U0024Low Speed CAN Communication Bus (-) open
U0025Low Speed CAN Communication Bus (-) low
U0026Low Speed CAN Communication Bus (-) high
U0027Low Speed CAN Communication Bus (-) shorted to Bus (+)
U0028Vehicle Communication Bus A
U0029Vehicle Communication Bus A Performance
U0030Vehicle Communication Bus A (+) open
U0031Vehicle Communication Bus A (+) low
U0032Vehicle Communication Bus A (+) high
U0033Vehicle Communication Bus A (-) open
U0034Vehicle Communication Bus A (-) low
U0035Vehicle Communication Bus A (-) high
U0036Vehicle Communication Bus A (-) shorted to Bus (+)
U0037Vehicle Communication Bus B
U0039Vehicle Communication Bus B (+) open
U0040Vehicle Communication Bus B (+) low
U0041Vehicle Communication Bus B (+) high
U0042Vehicle Communication Bus B (-) open
U0043Vehicle Communication Bus B (-) low
U0044Vehicle Communication Bus B (-) high
U0045Vehicle Communication Bus B (-) shorted to Bus (+)
U0046Vehicle Communication Bus C
U0047Vehicle Communication Bus C Performance
U0048Vehicle Communication Bus C (+) open
U0049Vehicle Communication Bus C (+) low
U0050Vehicle Communication Bus C (+) high
U0051Vehicle Communication Bus C (-) open
U0052Vehicle Communication Bus C (-) low
U0053Vehicle Communication Bus C (-) high
U0054Vehicle Communication Bus C (-) shorted to Bus (+)
U0055Vehicle Communication Bus D
U0056Vehicle Communication Bus D Performance
U0057Vehicle Communication Bus D (+) open
U0058Vehicle Communication Bus D (+) low
U0059Vehicle Communication Bus D (+) high
U0060Vehicle Communication Bus D (-) open
U0061Vehicle Communication Bus D (-) low
U0062Vehicle Communication Bus D (-) high
U0063Vehicle Communication Bus D (-) shorted to Bus (+)
U0064Vehicle Communication Bus E
U0065Vehicle Communication Bus E Performance
U0066Vehicle Communication Bus E (+) open
U0067Vehicle Communication Bus E (+) low
U0068Vehicle Communication Bus E (+) high
U0069Vehicle Communication Bus E (-) open
U0070Vehicle Communication Bus E (-) low
U0071Vehicle Communication Bus E (-) high
U0072Vehicle Communication Bus E (-) shorted to Bus (+)
U0073Control Module Communications Bus Off
U0100Lost Communication with ECM/PCM A
U0101Lost Communication with TCM
U0102Lost Communication with Transfer Case Control Module
U0103Lost Communication with Gear Shift Module
U0104Lost Communication with Cruise Control Module
U0105Lost Communication with Fuel Injector Control Module
U0192Lost Communication with Television
U0197Lost Communication with Telephone Control Module
U0198Lost Communication with Telematic Control Module
U0222Lost Communication with Door Window Motor A
U0235Lost Communications with Cruise Control Front Distance Range Sensor
U0301Software Incompatibility with ECM/PCM
U0302Software Incompatibility with TCM (Transmission Control Module)
U0303Software Incompatibility with Transfer Case Control Module
U0321Software Incompatibility with Ride Level Control Module
U0326Software Incompatibility with Vehicle Immobilizer Control Module
U0327Software Incompatibility with Vehicle Security Control ModuleMercedes new Bosch drive-by-wire throttle body failing
U0038Vehicle Communication Bus B Performance

Mercedes Smart car steering rack Failure
Mercedes Earlier C Class instrument cluster gauge problems
Mercedes hydraulic roof pump on newer CL SL CLK SLK Class failing
Mercedes Sensotronic SBC system failing
Mercedes central locking vacuum pump
Mercedes SLK instrument cluster / panel / dashboard failing
Mercedes S Class instrument cluster / panel / dash failing
Mercedes C and E Class dashboards failing
Mercedes Throttle Body
Mercedes A Class electric hydraulic power steering failing
Mercedes A Class combined air mass meter and ECU
Merecedes A Class air flow meters failing
Mercedes 111 16v engine throttle body failing
Mercedes C and E Class ABS pump failing
Mercedes C/E/S Class, CLK/SLK throttle bodies failing
Mercedes CL and SL Class soft top convertible roof controllers failing
Mercedes 280/300/350 ECU
Mercedes 300/AMG 300 ECU
Mercedes CLK 320, SL 280, SL 320 ECU
Mercedes VDO ecu systems being damaged by harness overheating
Mercedes Seimens and Bosch ignition modules failing
Mercedes E Class ABS ECU fault codes
*Common Ignition ECU failures
*C Class & E Class Cats rattling from 93 on