OBD-II code · Powertrain (generic, extended)
P2546 Torque Management Request Input Signal A Low
Torque management input A reads stuck low — analog short to ground or message stuck at minimum value. The ECM cannot trust the request and falls back to a safe default.
Is it safe to drive with P2546?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelySignal wire shorted to ground
- PossibleCAN message stuck at minimum value
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 A
Related codes
- P2545Torque Management Request Input Signal A Range/Performance
- P2550Torque Management Request Input Signal B Low
- P2543Power Demand Signal Circuit
- P2544Torque Management Request Input Signal A
- P2547Torque Management Request Input Signal A High
- P2548Torque Management Request Input Signal B
- P2549Torque Management Request Input Signal B Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.