OBD-II code · Powertrain (generic, extended)
P2548 Torque Management Request Input Signal B
General electrical fault on the second torque-management request input B. Used when more than one module needs to request torque adjustments — typically TCM on input A and ABS/ESC on input B, or chassis vs powertrain. With B invalid, only the A-side request is honoured.
Is it safe to drive with P2548?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyOpen or shorted wire / invalid CAN message
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Torque Management Input B
Related codes
- P2544Torque Management Request Input Signal A
- P2545Torque Management Request Input Signal A Range/Performance
- P2546Torque Management Request Input Signal A Low
- P2547Torque Management Request Input Signal A High
- P2549Torque Management Request Input Signal B Range/Performance
- P254APTO Speed Selector Sensor/Switch 1 Circuit/Open
- P254BPTO Speed Selector Sensor/Switch 1 Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.