Chevrolet Code P0231 is a commonly occurring issue that can lead to various malfunctions in the vehicle. This code is defined as a “Fuel Pump Feedback Circuit Low Input” and is set when, during key on or engine running, the Fuel Lift Pump is commanded “on” and the PCM detects a difference between system voltage and fuel pump feedback signal that is more than 4v for two seconds. In order to diagnose and resolve this issue, it is important to understand the possible causes and solutions that can be used to fix this issue. Knowing the potential triggers and the corrective measures that can be taken is essential in order to properly address Code P0231 and get a Chevrolet back on the road.
Causes and Solutions of Chevrolet Code P0231
| Cause | Solution |
|---|---|
| Fuel pump feedback circuit is open or shorted to ground | Inspect and repair the wiring of the fuel pump feedback circuit and replace any damaged components |
| Fuel pump relay power circuit is open or the relay is damaged | Examine the fuel pump relay power circuit and replace the relay if necessary |
| Fuel pump relay control circuit is open or shorted to power | Check the fuel pump relay control circuit and repair any open or short circuits |
| PCM is damaged | Replace the PCM if it is determined to be defective |
Fuel Pump Feedback Circuit Low Input
The most common cause of the Chevrolet Code P0231 is a low input in the fuel pump feedback circuit. This occurs when the system voltage is different from the fuel pump feedback signal by more than 4v for two seconds. To diagnose and fix this issue, it is important to inspect and repair the wiring of the fuel pump feedback circuit and replace any damaged components.
Fuel Pump Relay Power Circuit
If the fuel pump relay power circuit is open or the relay is damaged, it can cause the Chevrolet Code P0231. In this case, the fuel pump relay power circuit should be inspected and the relay replaced if necessary.
Fuel Pump Relay Control Circuit
The fuel pump relay control circuit may be open or shorted to power, which can lead to the Chevrolet Code P0231. To fix this issue, the fuel pump relay control circuit should be checked and any open or short circuits should be repaired.
PCM Damage
In some cases, the PCM can be damaged and cause the Chevrolet Code P0231. If it is determined that the PCM is defective, it should be replaced in order to resolve the issue.
Conclusion
In summary, Chevrolet Code P0231 is a commonly occurring issue that can lead to various malfunctions in the vehicle. To diagnose and resolve this issue, it is important to understand the possible causes and solutions that can be used to fix this issue. Knowing the potential triggers and the corrective measures that can be taken is essential in order to properly address Chevrolet Code P0231 and get a Chevrolet back on the road.
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