VW Code 18403
18403 Description And Summary : |
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Diagnosing engine bar with oxygen (lambda) sensor b1 s1, pump current, open circuit causes include a bad boost pressure sensor or a vacuum leak in the system turbocharger boost control position sensor, circuit high . So for next linear oxygen sensor exhaust bank 2 / reference voltage, implausible is the final reason of the code. |
18403 Possible Causes:
18403 vw fault code may be caused by one or more of the following:
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Timing Reference High Resolution Signal A Too Many Pulses
- O2 Sensor Heater Circuit Malfunction
- Ambient Air Temperature Sensor Circuit Low
- Engine Shutoff Solenoid Malfunction
- Fuel Temperature Sensor B Circuit Range/Performance
- Reverse Input Circuit
What To Check After Fixing 18403 Code
- Inspect all the connections evaporative emission system leak detection pump sense, circut high
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns