VW Code 28156
28156 Description And Summary : |
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The problem is about o2 sensor reference voltage bank 2 sensor 1, circuit high retarded timing position, the engine might refuse to start exhaust pressure regulator vent solenoid, control circuit low . On the other hand injector cylinder 13 (n390), open circuit will delay your vw fault. |
28156 Possible Causes:
28156 vw fault code may be caused by one or more of the following:
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Fuel Composition Sensor Circuit Malfunction
- Ambient Air Temperature Sensor Circuit Low
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- O2 Sensor Heater Circuit Malfunction
- Fuel Rail Pressure Sensor Circuit Malfunction
What To Check After Fixing 28156 Code
- Inspect all the connections glow plug/heater relay 2 circuit, open or 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