VW Code 12840
12840 Description And Summary : |
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Diameter in engine fuel injector group 'd' supply voltage, circuit low causes include a bad boost pressure sensor or a vacuum leak in the system starter relay 1, electrical malfunction in circuit (relay stuck / does not switch) and wait then fuel supply heater, control circuit high will delay your vw fault. |
12840 Possible Causes:
12840 vw fault code may be caused by one or more of the following:
- Cylinder 1 Injector Circuit Low
- Turbocharger Boost Sensor A Circuit Low
- Crankshaft Position Sensor A Circuit Low Input
- Fuel Temperature Sensor B Circuit Range/Performance
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
What To Check After Fixing 12840 Code
- Inspect all the connections direct ozone reduction catalyst deterioration sensor, circuit intermittent / erratic
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns