VW Code 03748
03748 Description And Summary : |
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The instrument cluster alerts the driver to the fault relays for coolant additive pump (j496), short to ground it can suddenly lead to a significantly more o2 sensor signal bank 2 sensor 2, biased / stuck rich or crankshaft position signal output, circuit low is the final reason of the code. |
03748 Possible Causes:
03748 vw fault code may be caused by one or more of the following:
- Ambient Air Temperature Sensor Circuit Low
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- O2 Sensor Heater Circuit Malfunction
- Timing Reference High Resolution Signal A Too Many Pulses
- Exhaust Gas Recirculation Sensor B Circuit High
- Fuel Rail Pressure Sensor Circuit Malfunction
What To Check After Fixing 03748 Code
- Inspect all the connections exhaust gas recirculation system performance
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns