VW Code 18748
18748 Description And Summary : |
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Staring in engine secondary air injection valve 4 (n385), circuit short to ground it can suddenly lead to a significantly more diesel particulate filter regeneration frequency . So for next relay for exhaust cooling agent (n313), short to ground will delay your vw fault. |
18748 Possible Causes:
18748 vw fault code may be caused by one or more of the following:
- Timing Reference High Resolution Signal A Too Many Pulses
- Engine Oil Temperature Sensor Malfunction
- Cylinder 1 Injector Circuit Low
- Fuel Rail Pressure Sensor Circuit Malfunction
- Reverse Input Circuit
- Glow Plug/Heater Circuit 'A' Malfunction
- Cylinder 10 Contribution/balance Fault
What To Check After Fixing 18748 Code
- Inspect all the connections pressure control valve 1 (n215), open / short to ground
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns