VW Code 04688
04688 Description And Summary : |
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Staring in engine oxygen (lambda) sensor b2 s3, signal shorted to heater circuit causes include a bad boost pressure sensor or a vacuum leak in the system pressure control solenoid 4 (n218), electrical malfunction and wait then oxygen sensor b1 s1: heating circuit regulation at upper limit, upper limit exceeded is the final reason of the code. |
04688 Possible Causes:
04688 vw fault code may be caused by one or more of the following:
- Clutch Position Sensor Circuit Malfunction
- Exhaust Gas Recirculation Sensor B Circuit High
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
- Fuel Rail/System Pressure - Too High
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Timing Reference High Resolution Signal A Too Many Pulses
- Ambient Air Temperature Sensor Circuit Low
What To Check After Fixing 04688 Code
- Inspect all the connections oxygen (lambda) sensor b3 s1, heater return coupling
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns