If you own a Subaru and the check engine light has lit up with a code P0122, this could be due to a low voltage circuit in the throttle/pedal position sensor. This code is called Throttle/Pedal Position Sensor/Switch “A” Circuit Low. The problem may manifest through improper idling, engine stalls, and poor driving performance. The underlying cause of this code can be due to a wiring harness between the ECM and electronic throttle control needing repair, a defective electronic throttle control, or a defective ECM. It is important to understand the root cause of the code to address it properly. Subaru code P0122 requires attention and is best-taken care of by a professional.
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Causes and Solutions of Subaru Code P0122
| Cause | Solution |
|---|---|
| The wiring harness between the ECM and electronic throttle control needs to be repaid. | Replace or repair the wiring harness |
| Defective electronic throttle control | Replace the electronic throttle control |
| Defective ECM | Replace the ECM |
| Improper idling and poor driving performance | Check for air leakage in the intake system |
When the check engine light in your Subaru comes on with the code P0122, it is important to pay attention to the cause of the issue. Subaru code P0122 indicates a low voltage circuit in the throttle/pedal position sensor, resulting in improper idling, engine stalls, and poor driving performance. Knowing the cause of the problem is essential to fix it properly. There are a few potential causes: a wiring harness between the ECM and electronic throttle control needing repair, a defective electronic throttle control, or a defective ECM. The reasons and solutions for Subaru code P0122 should be followed closely, and if unsure, it is best to consult a professional for the correct repair.
The wiring Harness between the ECM and Electronic Throttle Control Needs Repair
If the wiring harness between the ECM and electronic throttle control needs repair, the only solution is replacing or repairing the harness. Depending on the age and condition of the vehicle, the wiring harness may need to be replaced entirely. If it is a newer model, it may be possible to repair the wiring harness.
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Defective Electronic Throttle Control
If the electronic throttle control is defective, the only solution is to replace the electronic throttle control. This can be a more expensive option as it is a more intricate and complicated procedure.
Defective ECM
If the ECM is defective, the only solution is to replace the ECM. This is a very involved process requiring much skill and experience.
Improper Idling and Poor Driving Performance
If the Subaru code P0122 is due to improper idling and poor driving performance, the likely cause is air leakage in the intake system. This can be checked by a qualified technician who can detect and repair any air leaks in the system.
💥See also: Subaru Code P0147
Conclusion
When a Subaru code P0122 comes up, it is important to take it seriously and address it properly. Understanding the root cause of the code is essential to repair it properly. The possible reasons can range from a wiring harness between the ECM and electronic throttle control needing repair, a defective electronic throttle control or a faulty ECM. To ensure the repair is done correctly, it is best to consult a professional for the Subaru code P0122 repair.
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