OBD-II code · Powertrain (generic, extended)
P2544 Torque Management Request Input Signal A
The ECU detects an invalid torque-management request signal A from another control unit (e.g. transmission, ESP, ABS) on the CAN bus. Cooperative torque control cannot be performed as expected.
Is it safe to drive with P2544?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyCAN communication error
- PossibleFault in requesting module
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Usually unaffected
- Parts involved
- Can Bus, Tcm, ABS Module
Related codes
- P2548Torque Management Request Input Signal B
- P2541Low Pressure Fuel System Sensor Circuit Range/Performance
- P2542Low Pressure Fuel System Sensor Circuit High
- P2543Power Demand Signal Circuit
- P2545Torque Management Request Input Signal A Range/Performance
- P2546Torque Management Request Input Signal A Low
- P2547Torque Management Request Input Signal A High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.