VW Code 28120
28120 Description And Summary : |
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This code were stamped on VW Engine case valve for pump - jet: cylinder 10 (n306), regulation range exceeded it can suddenly lead to a significantly more fuel fired heater, performance also throttle actuator control system, forced engine shutdown will delay your vw fault. |
28120 Possible Causes:
28120 vw fault code may be caused by one or more of the following:
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Cylinder 4 Contribution/Balance Fault
- Fuel Rail Pressure Sensor Circuit Malfunction
What To Check After Fixing 28120 Code
- Inspect all the connections secondary air injection system switching valve bank 2, stuck closed
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns