P2544
Torque Management Request Input Signal A
Torque management / powertrain
Generic OBD-II
Medium
What it means
P2544 means the ECM received an invalid torque-management request on input signal "A" — a signal from another module such as the transmission, traction/stability control, or ABS asking the engine to adjust its output. A fault in this signal can put the engine into reduced-power or limp mode, though it usually still runs.
Medium
Can I keep driving? Often drivable, but the engine may drop into reduced-power or limp mode — have it checked before driving far.
Common symptoms
What you'll notice
- Reduced power or limp mode
- Check-engine light on
- Harsh or delayed gear shifts
- Hesitation under acceleration
Common causes
Most likely first
- Wiring or connector fault on the torque-request signal circuit between modulesLikely
- Faulty requesting module (transmission, traction/stability control, or ABS)Common
- Poor ground or corroded connectorCommon
- Communication or software fault between modulesLess often
- Rarely, an ECM faultLess often
How to diagnose & fix
Work through it in order
- Scan all modules for companion codes from the transmission, ABS, or traction control.
- Record freeze-frame data to see when the request went invalid.
- Inspect the torque-request signal wiring and connectors between modules.
- Check module communication on the data bus.
- Repair any related module or wiring fault, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2544?+
It's often drivable, but the engine may cut power unexpectedly, so have it diagnosed before longer trips.
Can I just clear P2544?+
It will return until the requesting module or its wiring is repaired.
Related codes
Often seen with P2544
Read & clear P2544 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX