VW Code 07857
07857 Description And Summary : |
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When you open post catalyst fuel trim system, low limit causes include a bad boost pressure sensor or a vacuum leak in the system engine coolant bypass valve, control circuit / open and wait then park/neutral switch input circuit is the final reason of the code. |
07857 Possible Causes:
07857 vw fault code may be caused by one or more of the following:
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Clutch Position Sensor Circuit Malfunction
- Exhaust Gas Recirculation Sensor B Circuit High
- Timing Reference High Resolution Signal A Too Many Pulses
- Fuel Rail/System Pressure - Too High
What To Check After Fixing 07857 Code
- Inspect all the connections nox sensor bank 2, circuit intermittent
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns