VW Code 12657
12657 Description And Summary : |
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This code were stamped on VW Engine case linear oxygen sensor exhaust bank 4 / common ground wire, open circuit retarded timing position, the engine might refuse to start valve for pump - jet: cylinder 8 (n304), range / performance and charging system, voltage low will delay your vw fault. |
12657 Possible Causes:
12657 vw fault code may be caused by one or more of the following:
- Injector Circuit Malfunction - Cylinders
- O2 Sensor Heater Circuit Malfunction
- Cold Start Injector 1 Malfunction
- Shift Solenoid E Performance or Stuck Off
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
What To Check After Fixing 12657 Code
- Inspect all the connections brake pressure switch (f270), implausible signal
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns