OBD-II code · Powertrain (generic, extended)
P2637 Torque Management Feedback Signal A
The torque feedback signal A from the transmission or other torque user is missing or invalid. The engine controller cannot reduce torque on shift requests, which can cause harsh shifts.
Is it safe to drive with P2637?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyRequired CAN message not received in time
- PossibleSource module reports an internal fault
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Usually unaffected
- Parts involved
- Tcm, Communication Bus, Wiring Harness
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.