VW Code 12178
12178 Description And Summary : |
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This something to do with the intake camshaft timing reductant injection valve bank 2 unit 1, circuit low causes include a bad boost pressure sensor or a vacuum leak in the system bank 1, system too lean off idle . So for next data-bus powertrain, implausible message from transmission controller will delay your vw fault. |
12178 Possible Causes:
12178 vw fault code may be caused by one or more of the following:
- Cold Start Injector 1 Malfunction
- O2 Sensor Heater Circuit Malfunction
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Crankshaft Position Sensor B Circuit Malfunction
- Engine Shutoff Solenoid Malfunction
- Exhaust Gas Recirculation Sensor B Circuit High
What To Check After Fixing 12178 Code
- Inspect all the connections pressure control solenoid 6 (n371) 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