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.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: hard
Common causes
Ordered by how often each turns out to be the cause.
- CAN communication errorCommon
- Fault in requesting modulePossible
Parts involved
- CAN Bus
- TCM
- ABS Module
P2544 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.