VW Code 12656
12656 Description And Summary : |
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The problem is about glow plug / heater relay, circuit short to b+ causes include a bad boost pressure sensor or a vacuum leak in the system direct ozone reduction catalyst, efficiency below threshold or valve for engine storage (n144/145), interruption / short-circuit after mass will delay your vw fault. |
12656 Possible Causes:
12656 vw fault code may be caused by one or more of the following:
- Exhaust Gas Recirculation Sensor B Circuit High
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Cylinder 4 Contribution/Balance Fault
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Injector Circuit Malfunction - Cylinders
- Engine Oil Temperature Sensor Malfunction
- Cold Start Injector 1 Malfunction
What To Check After Fixing 12656 Code
- Inspect all the connections o2 sensor pumping current trim bank 2 sensor 1, circuit low
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns