P2547
Torque Management Request Input Signal A High
Powertrain torque management
Generic OBD-II
Medium
What it means
P2547 means the engine computer sees the 'A' torque-management request signal reading too high. This signal lets the transmission and engine coordinate torque during shifts, so a stuck-high input can cause shift quality problems or reduced power. It usually points to a wiring, connector, or control-module fault.
Medium
Can I keep driving? Usually drivable, but the engine and transmission share torque signals, so you may notice firm or odd shifts or reduced power until it's fixed.
Common symptoms
What you'll notice
- Check-engine light on
- Harsh, delayed, or unusual gear shifts
- Reduced power or a limp-mode restriction on some vehicles
- Often no obvious symptom beyond the warning light
Common causes
Most likely first
- Short to voltage or open in the torque-management request circuit wiringLikely
- Corroded or loose connector between the ECM and transmission control moduleCommon
- Faulty transmission control module (TCM) sending the requestCommon
- Poor ground affecting the signal referenceLess often
- Rarely, a faulty ECMLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and check for related transmission or communication codes.
- Inspect the wiring and connectors between the ECM and TCM for shorts to power, opens, or corrosion.
- Verify grounds and the signal reference on the torque-management circuit.
- Test the request signal with a scan tool to see whether it's stuck high.
- Repair wiring/connectors first; replace the TCM or ECM only if confirmed faulty, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2547?+
Usually yes, but shifting and power delivery can be affected, so avoid heavy loads and get it diagnosed soon.
Can I just clear P2547?+
It returns until the circuit or module fault is fixed. Clearing only turns the light off temporarily.
Related codes
Often seen with P2547
Read & clear P2547 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