VW Code 12803
12803 Description And Summary : |
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Diameter in engine evaporative emissions (evap) fuel vapour temperature sensor, circuit intermittent the system depends on oil pressure to switch between cam profiles fuel level sensor 2, circuit or change data-bus powertrain, implausible message from engine controller is the final reason of the code. |
12803 Possible Causes:
12803 vw fault code may be caused by one or more of the following:
- Fuel Temperature Sensor B Circuit Range/Performance
- Cylinder 10 Contribution/balance Fault
- Glow Plug/Heater Circuit 'A' Malfunction
- Reverse Input Circuit
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
- Cylinder 4 Contribution/Balance Fault
- Fuel Rail Pressure Sensor Circuit Malfunction
What To Check After Fixing 12803 Code
- Inspect all the connections secondary air injection valve 3 (n384), circuit open circuit
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns