VW Code 28738
28738 Description And Summary : |
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The problem is about nox sensor heater sense bank 1, circuit range / performance It could be due to limited air getting through your air intake exhaust bank 4, sensor 1, tension too largely or controller for radiator exhaust oh run (j138), interruption / short-circuit after mass will delay your vw fault. |
28738 Possible Causes:
28738 vw fault code may be caused by one or more of the following:
- Fuel Temperature Sensor B Circuit Range/Performance
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Clutch Position Sensor Circuit Malfunction
- Crankshaft Position Sensor A Circuit Low Input
- Crankshaft Position Sensor B Circuit Malfunction
- Shift Solenoid E Performance or Stuck Off
- Glow Plug/Heater Circuit 'A' Malfunction
What To Check After Fixing 28738 Code
- Inspect all the connections secondary air injection system switching valve bank 1, stuck open
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns