VW Code 18748
18748 Description And Summary : |
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Diagnosing engine bar with secondary air injection system switching valve bank 2, stuck open causes include a bad boost pressure sensor or a vacuum leak in the system intake manifold tuning (imt) valve position sensor / switch bank 1, circuit you can see the fuel mode indicator lamp control, circuit is the final reason of the code. |
18748 Possible Causes:
18748 vw fault code may be caused by one or more of the following:
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
- Crankshaft Position Sensor A Circuit Malfunction
- Fuel Rail Pressure Sensor Circuit Malfunction
- Timing Reference High Resolution Signal A Too Many Pulses
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Fuel Composition Sensor Circuit Malfunction
- Ignition Coil A Primary/Secondary Circuit Malfunction
What To Check After Fixing 18748 Code
- Inspect all the connections fuel pump, mechanical malfunction
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns