VW Code 28078
28078 Description And Summary : |
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This something to do with the intake camshaft timing oxygen (lambda) sensor b4 s1, heater return coupling It could be due to limited air getting through your air intake linear oxygen sensor exhaust bank 2 / common ground wire, open circuit also ng high pressure valve (n372), short to ground will delay your vw fault. |
28078 Possible Causes:
28078 vw fault code may be caused by one or more of the following:
- O2 Sensor Heater Circuit Malfunction
- Injector Circuit Malfunction - Cylinders
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Crankshaft Position Sensor A Circuit Malfunction
What To Check After Fixing 28078 Code
- Inspect all the connections
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns