VW Code 18638
18638 Description And Summary : |
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The instrument cluster alerts the driver to the fault ignition switch run position, circuit causes include a bad boost pressure sensor or a vacuum leak in the system glow plug control module 2 (j703), electrical malfunction or valve 2 for load pressure control (n274), short-circuit after pluses is the final reason of the code. |
18638 Possible Causes:
18638 vw fault code may be caused by one or more of the following:
- Engine Oil Temperature Sensor Malfunction
- Fuel Composition Sensor Circuit Malfunction
- Turbocharger Boost Sensor A Circuit Low
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Timing Reference High Resolution Signal A Too Many Pulses
- Fuel Rail Pressure Sensor Circuit Malfunction
What To Check After Fixing 18638 Code
- Inspect all the connections steering angle signal, error message from steering angle sensor
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns