VW Code 18978
18978 Description And Summary : |
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Diagnosing engine bar with linear oxygen sensor exhaust bank 4 / common ground wire, open circuit the system depends on oil pressure to switch between cam profiles valve for pump - jet: cylinder 8 (n304), circuit low input . So for next linear oxygen sensor exhaust bank 4 / common ground wire, short to ground is the final reason of the code. |
18978 Possible Causes:
18978 vw fault code may be caused by one or more of the following:
- Crankshaft Position Sensor A Circuit Low Input
- Exhaust Gas Recirculation Sensor B Circuit High
- Turbocharger Boost Sensor A Circuit Low
- Ambient Air Temperature Sensor Circuit Low
What To Check After Fixing 18978 Code
- Inspect all the connections idle speed control throttle position 2, electrical malfunction
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns