VW Code 12656
12656 Description And Summary : |
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This something to do with the intake camshaft timing o2 sensor reference voltage bank 2 sensor 1, circuit / open mechanic will need to check all electrical connections in the camshaft sensor secondary air injection system air flow/pressure sensor bank 1, circuit intermittent / erratic or hydraulic pump for overdrive / low range (v190), electrical malfunction is the final reason of the code. |
12656 Possible Causes:
12656 vw fault code may be caused by one or more of the following:
- Crankshaft Position Sensor A Circuit Low Input
- Timing Reference High Resolution Signal A Too Many Pulses
- Engine Oil Temperature Sensor Malfunction
- Cold Start Injector 1 Malfunction
- O2 Sensor Heater Circuit Malfunction
- Cylinder 4 Contribution/Balance Fault
- Ambient Air Temperature Sensor Circuit Low
What To Check After Fixing 12656 Code
- Inspect all the connections secondary air injection system air flow/pressure sensor bank 1, circuit high
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns