Chevrolet Code P2797 can cause serious issues in your transmission system if not addressed in a timely manner. P2797 is an auxiliary transmission fluid pump performance code that indicates a discrepancy between the commanded pump speed and the actual pump speed. Ignition voltage must be between 8-18 volts and the transmission fluid pump must be commanded ON. When the hybrid powertrain control module observes the difference between actual and commanded auxiliary transmission fluid pump pump speed is greater than 500 RPM for 4 out of 4.125 seconds, this can cause P2797 to be triggered. To prevent this from occurring, it is important to be aware of the causes and solutions associated with this issue. The following table outlines the causes and solutions for Chevrolet Code P2797.
Causes and Solutions for Chevrolet Code P2797
| Cause | Solution |
|---|---|
| Ignition voltage is not within 8-18 volts range | Check and adjust the ignition voltage |
| The auxiliary transmission fluid pump is not commanded ON | Manually command the pump to be ON |
| The difference between the actual and commanded pump speeds is greater than 500 RPM for 4 out of 4.125 seconds | Check the pump speed and adjust as necessary |
| Related service bulletins need to be addressed | Refer to the service bulletins for further information and action |
Ignition Voltage Check
The first step in troubleshooting Chevrolet Code P2797 is to check the ignition voltage. The voltage should be between 8-18 volts. If it is not in the specified range, it should be adjusted accordingly. This can be done by using a digital multimeter to measure the voltage. If the voltage is not in the specified range, it should be adjusted accordingly.
Check Auxiliary Transmission Fluid Pump
The next step is to check the auxiliary transmission fluid pump. This can be done by manually commanding the pump to be ON. If the pump is not commanded ON, the issue should be addressed by referring to the service bulletins for further information and action.
Check Pump Speed
The last step is to check the difference between the actual and commanded pump speeds. The difference should be less than 500 RPM for 4 out of 4.125 seconds. If the difference is greater than 500 RPM, the issue should be addressed by checking the pump speed and adjusting as necessary.
Conclusion: Resolve Chevrolet Code P2797 with Careful Troubleshooting
Properly resolving Chevrolet Code P2797 requires careful troubleshooting of the transmission system. To prevent this code from being triggered, it is important to be aware of the causes and solutions associated with this issue. Ignition voltage must be between 8-18 volts and the transmission fluid pump must be commanded ON. The difference between the actual and commanded pump speed must be less than 500 RPM for 4 out of 4.125 seconds. If any of these conditions are not met, P2797 can be triggered. Therefore, when troubleshooting this issue, it is important to check the ignition voltage, command the pump to be ON, and check the pump speed, as necessary.
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