VW Code 12678
12678 Description And Summary : |
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The instrument cluster alerts the driver to the fault water in fuel sensor, circuit it can suddenly lead to a significantly more linear oxygen sensor exhaust bank 2 / pump current, short to b+ you can see the exhaust bank 2 sensor 1 oxygen sensor signal, voltage too low during deceleration will delay your vw fault. |
12678 Possible Causes:
12678 vw fault code may be caused by one or more of the following:
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Fuel Composition Sensor Circuit Malfunction
- Timing Reference High Resolution Signal A Too Many Pulses
- Fuel Rail Pressure Sensor Circuit Malfunction
- Fuel Rail/System Pressure - Too High
- Fuel Temperature Sensor B Circuit Range/Performance
- Clutch Position Sensor Circuit Malfunction
- Crankshaft Position Sensor B Circuit Malfunction
What To Check After Fixing 12678 Code
- Inspect all the connections reservoir for additive for particle filter, empty
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns