P2545
Torque Management Request Input Signal A Range/Performance
Torque management / driveline
Generic OBD-II
Medium
What it means
P2545 means the ECM received a torque-management request signal ('A') that is outside its expected range. Other modules — such as the transmission, traction, or stability control — ask the engine to raise or lower torque, and here that request is implausible. The engine may reduce power or enter limp mode to stay safe. Because the signal originates elsewhere, diagnosis should scan every module, not just the engine.
Medium
Can I keep driving? Often reduced — the car may enter limp mode or cut power when the torque-request signal is implausible, so drive gently and diagnose soon.
Common symptoms
What you'll notice
- Check-engine light on
- Reduced engine power or limp mode
- Unexpected torque reduction, surging, or hesitation
- Harsh or altered shifting
- Traction or stability warning light on some vehicles
Common causes
Most likely first
- Fault in the module sending the torque request (transmission, traction/ABS)Likely
- Wiring or connector problem on the inter-module signal circuitCommon
- Poor communication between the requesting module and the ECMCommon
- Software or calibration mismatch between modulesLess often
How to diagnose & fix
Work through it in order
- Scan every module, not just the engine, and note related codes in the TCM or ABS.
- Read freeze-frame data to see when the implausible request occurs.
- Inspect the wiring and connectors carrying the torque-request signal.
- Diagnose and repair the source module or network fault first.
- Check for applicable software updates; clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2545?+
Drive gently and get it looked at. The engine may cut power or enter limp mode when the torque-request signal is out of range, which can be unsafe when merging or passing.
Can I just clear P2545?+
You can, but the request comes from another module, so it will return until that source is fixed. Scan all modules and repair the root cause.
Related codes
Often seen with P2545
Read & clear P2545 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