DTC P2638
DTC P2638 : Torque Management Feedback Signal A Range/Performance
- Before you troubleshoot, Review the General Troubleshooting Information .
- This code has a high rate of misdetection.
- This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
- Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.
| DTC Description | Confirmed DTC | Pending DTC | Freeze Frame |
|---|---|---|---|
| P2638 Torque Management Feedback Signal A Range/Performance |
DTC (A/T)
- PGM-FI system DTC check
- 1. Turn the vehicle to the ON mode.
- 2. Check for Pending or Confirmed DTCs in the PGM-FI system and A/T system with the HDS.
PGM-FI system
DTC Description Confirmed DTC Pending DTC A/T system
DTC Description Confirmed DTC Pending DTC Freeze Frame Are PGM-FI or A/T system DTCs indicated at the same time?
YES
Go to the indicated PGM-FI system DTC's troubleshooting - Refer to:
- Brake Booster Pressure Monitoring System DTC Troubleshooting Index,
- A/T System DTC Troubleshooting Index (2016 2017 2018),
- A/T System DTC Troubleshooting Index (2019 2020),
- Fuel and Emissions Systems DTC Troubleshooting Index (2016 2017 2018 2019 2020),
- Fuel and Emissions Systems DTC Troubleshooting Index (2021)
- A/T System DTC Troubleshooting Index (2016 2017), or A/T System DTC Troubleshooting Index (2018), or A/T System DTC Troubleshooting Index (2019 2020), or A/T System DTC Troubleshooting Index (2021) .
Then troubleshoot any A/T system DTC's - Refer to:
NO
Go to step 2.
- Problem verification
- 1. Clear the DTC with the HDS.
- 2. Test-drive the vehicle for several minutes under the same conditions as those indicated by the freeze data.
- 3. Check for Pending or Confirmed DTCs with the HDS.
DTC Description Confirmed DTC Pending DTC Freeze Frame P2638 Torque Management Feedback Signal A Range/Performance Is DTC P2638 indicated?
YES
Check the customer's transmission related complaint and proceed to further troubleshooting using the A/T System Symptom Troubleshooting Index. - Refer to: A/T System Symptom Troubleshooting Index (2019 2020 2021: 9-Speed A/T) or A/T System Symptom Troubleshooting Index (6-Speed A/T) or A/T System Symptom Troubleshooting Index (2016 2017 2018: 9-Speed A/T) .
NO
Intermittent failure, the system is OK at this time. Check for poor connections and loose terminals at the TCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.