P2549
Torque Management Request Input Signal B Range/Performance
Input B is electrically intact but the values are implausible — same failure mode as the A-side performance fault, applied to the second torque-management channel.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: hard
Common causes
Ordered by how often each turns out to be the cause.
- Requesting module sending invalid valuesCommon
- Sensor element aged beyond calibration windowLess likely
- Sensor mounting loose - signal dampingLess likely
Parts involved
- Torque Management Input B
P2549 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.