VW Code 18438
18438 Description And Summary : |
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When you open relays for coolant additive pump (j496), open circuit causes include a bad boost pressure sensor or a vacuum leak in the system pressure control solenoid 3 (n217), short to b+ . So for next exhaust bank 1 sensor 1 oxygen sensor signal, voltage too low during deceleration is the final reason of the code. |
18438 Possible Causes:
18438 vw fault code may be caused by one or more of the following:
- Fuel Composition Sensor Circuit Malfunction
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Cylinder 10 Contribution/balance Fault
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
- Glow Plug/Heater Circuit 'A' Malfunction
- Crankshaft Position Sensor B Circuit Malfunction
- Shift Solenoid E Performance or Stuck Off
- Cold Start Injector 1 Malfunction
What To Check After Fixing 18438 Code
- Inspect all the connections exhaust bank 4, sensor 2, electrical error in the electric circuit
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns