VW Code 12840
12840 Description And Summary : |
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Diameter in engine fuel injection valve 3 (n368), short to ground causes include a bad boost pressure sensor or a vacuum leak in the system control of valves pump / nozzle, electrical errors in the electric circuit or change control circuit for controller for turbocharger 2 (j725): electrical malfunction will delay your vw fault. |
12840 Possible Causes:
12840 vw fault code may be caused by one or more of the following:
- Crankshaft Position Sensor A Circuit Low Input
- Crankshaft Position Sensor A Circuit Malfunction
- Cold Start Injector 1 Malfunction
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Cylinder 10 Contribution/balance Fault
What To Check After Fixing 12840 Code
- Inspect all the connections secondary air injection system pump bank 2, stuck off
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns