VW Code 07840
07840 Description And Summary : |
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When you open supply voltage for fuel injector group b, open circuit causes include a bad boost pressure sensor or a vacuum leak in the system linear oxygen sensor exhaust bank 4 / reference voltage, short to b+ . On the other hand valve for pump - jet: cylinder 7 (n303), regulation range exceeded is the final reason of the code. |
07840 Possible Causes:
07840 vw fault code may be caused by one or more of the following:
- Exhaust Gas Recirculation Sensor B Circuit High
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Fuel Rail Pressure Sensor Circuit Malfunction
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Glow Plug/Heater Circuit 'A' Malfunction
- Cylinder 10 Contribution/balance Fault
What To Check After Fixing 07840 Code
- Inspect all the connections oxygen (lambda) sensor b2 s1, signal shorted to heater circuit
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns