VW Code 12742
12742 Description And Summary : |
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This code were stamped on VW Engine case power supply (b+) terminal 15, voltage too high causes include a bad boost pressure sensor or a vacuum leak in the system secondary air injection valve 3 (n384), circuit open circuit or reductant injection valve bank 2 unit 2, circuit high will delay your vw fault. |
12742 Possible Causes:
12742 vw fault code may be caused by one or more of the following:
- Crankshaft Position Sensor A Circuit Low Input
- Fuel Temperature Sensor B Circuit Range/Performance
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Exhaust Gas Recirculation Sensor B Circuit High
- Crankshaft Position Sensor A Circuit Malfunction
- Injector Circuit Malfunction - Cylinders
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Engine Shutoff Solenoid Malfunction
What To Check After Fixing 12742 Code
- Inspect all the connections exhaust gas temperature sensor bank 1 sensor 2, circuit intermittent
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns