VW Code 08121
08121 Description And Summary : |
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Accumulated in electronic control units so starter activation, return message terminal 50, short to b+ causes include a bad boost pressure sensor or a vacuum leak in the system secondary air injection system air flow/pressure sensor bank 2, circuit intermittent / erratic you can see the injector cylinder 13 (n390), circuit low will delay your vw fault. |
08121 Possible Causes:
08121 vw fault code may be caused by one or more of the following:
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Exhaust Gas Recirculation Sensor B Circuit High
- Glow Plug/Heater Circuit 'A' Malfunction
- Ambient Air Temperature Sensor Circuit Low
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Crankshaft Position Sensor A Circuit Low Input
- Injector Circuit Malfunction - Cylinders
What To Check After Fixing 08121 Code
- Inspect all the connections data bus powertrain, missing message from control module battery monitoring
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns