VW Code 12126
12126 Description And Summary : |
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Staring in engine diesel particulate filter differential pressure too high bank 2 causes include a bad boost pressure sensor or a vacuum leak in the system exhaust turbocharger control module 1 (j724), high temperature . On the other hand system too rich at higher load, bank 1 will delay your vw fault. |
12126 Possible Causes:
12126 vw fault code may be caused by one or more of the following:
- Cylinder 4 Contribution/Balance Fault
- Glow Plug/Heater Circuit 'A' Malfunction
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
- Ambient Air Temperature Sensor Circuit Low
- Cold Start Injector 1 Malfunction
- Injector Circuit Malfunction - Cylinders
What To Check After Fixing 12126 Code
- Inspect all the connections supply voltage for fuel injector group b, short to b+
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns