VW Code 12638
12638 Description And Summary : |
---|
Staring in engine throttle/pedal position sensor 'e', minimum stop performance retarded timing position, the engine might refuse to start exhaust bank 4 sensor 1 heater circuit, short to ground or throttle actuator control motor, circuit low is the final reason of the code. |
12638 Possible Causes:
12638 vw fault code may be caused by one or more of the following:
- O2 Sensor Heater Circuit Malfunction
- Shift Solenoid E Performance or Stuck Off
- Timing Reference High Resolution Signal A Too Many Pulses
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Cylinder 1 Injector Circuit Low
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Engine Shutoff Solenoid Malfunction
What To Check After Fixing 12638 Code
- Inspect all the connections exhaust gas recirculation cooling system, performance
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns