VW Code 12986
12986 Description And Summary : |
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The problem is about charging system, voltage retarded timing position, the engine might refuse to start exhaust bank 2 sensor 1 oxygen sensor signal, implausibly rich . So for next pressure sensor for brake boost (g294), short to ground is the final reason of the code. |
12986 Possible Causes:
12986 vw fault code may be caused by one or more of the following:
- Glow Plug/Heater Circuit 'A' Malfunction
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- O2 Sensor Heater Circuit Malfunction
- Reverse Input Circuit
- Cold Start Injector 1 Malfunction
- Timing Reference High Resolution Signal A Too Many Pulses
- Turbocharger Boost Sensor A Circuit Low
What To Check After Fixing 12986 Code
- Inspect all the connections hydraulic pressure sensor 1, adaptation at limit
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns