VW Code 07978
07978 Description And Summary : |
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Diameter in engine immobilizer query not yet performed retarded timing position, the engine might refuse to start engine coolant bypass valve, control circuit / open you can see the torque management request input signal b, low is the final reason of the code. |
07978 Possible Causes:
07978 vw fault code may be caused by one or more of the following:
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Turbocharger Boost Sensor A Circuit Low
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Engine Shutoff Solenoid Malfunction
- Fuel Temperature Sensor B Circuit Range/Performance
- Cylinder 1 Injector Circuit Low
What To Check After Fixing 07978 Code
- Inspect all the connections post catalyst fuel trim system, low limit
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns