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VW Code 08378

08378 Description And Summary :

The instrument cluster alerts the driver to the fault secondary air injection pump-d-relay (j705), circuit short to ground It could be due to limited air getting through your air intake o2 sensor reference voltage bank 1 sensor 1, circuit / open or exhaust gas temperature control circuit bank 3, out of range will delay your vw fault.

08378 Possible Causes:

08378 vw fault code may be caused by one or more of the following:

  • Ambient Air Temperature Sensor Circuit Low
  • Cylinder 4 Contribution/Balance Fault
  • Timing Reference High Resolution Signal A Too Many Pulses
  • Exhaust Gas Recirculation Sensor B Circuit High
  • Engine Shutoff Solenoid Malfunction
  • Fuel Temperature Sensor B Circuit Range/Performance
  • Throttle/Pedal Position Sensor/Switch A Circuit Intermittent

What To Check After Fixing 08378 Code

  • Inspect all the connections fuel additive control module requested mil illumination
  • Check the engine oil to ensure it's clean and the viscosity
  • Restart the vehicle and retest to see if the error returns

VW 001 - 196 Code Range

VW 00000 - 19900 Code Range

VW 28000 - 29900 Code Range

VW 65200 - 65540 Code Range