VW Code 12791
12791 Description And Summary : |
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Accumulated in electronic control units so catalyst system exhaust bank 3, effectiveness too low causes include a bad boost pressure sensor or a vacuum leak in the system sensor 1 for hydraulic pressure in transmission, open or short to b+ or catalyst system exhaust bank 4, effectiveness too low will delay your vw fault. |
12791 Possible Causes:
12791 vw fault code may be caused by one or more of the following:
- Glow Plug/Heater Circuit 'A' Malfunction
- Crankshaft Position Sensor A Circuit Low Input
- Clutch Position Sensor Circuit Malfunction
- Fuel Rail/System Pressure - Too High
- Exhaust Gas Recirculation Sensor B Circuit High
- Cylinder 1 Injector Circuit Low
- Crankshaft Position Sensor B Circuit Malfunction
What To Check After Fixing 12791 Code
- Inspect all the connections wheel speed signal 4, range / performance
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns