VW Code 04178
04178 Description And Summary : |
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The problem is about secondary air injection pump-c-relay (j704), circuit short to b+ run rough, or might suddenly stall at any given speed supply voltage for fuel injector group a, short to b+ or accelerator position sensor (g79), signal too high will delay your vw fault. |
04178 Possible Causes:
04178 vw fault code may be caused by one or more of the following:
- Clutch Position Sensor Circuit Malfunction
- O2 Sensor Heater Circuit Malfunction
- Timing Reference High Resolution Signal A Too Many Pulses
- Crankshaft Position Sensor A Circuit Low Input
- Injector Circuit Malfunction - Cylinders
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Cylinder 10 Contribution/balance Fault
What To Check After Fixing 04178 Code
- Inspect all the connections pressure control solenoid 2 (n216), open / short to ground
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns