P2551
Torque Management Request Input Signal B High
What it means
P2551 means Torque Management Request Input Signal B High.
Check these first
- A short to voltage on the torque management request input B circuit
- A failed accelerator pedal position sensor
- A stuck throttle actuator control module
- Chafed torque management request input B wiring
What to do next
- Read torque management request input B on a scan tool
- Test the torque management request input B circuit for a short to voltage
- Check the accelerator pedal position sensor signal
- Check the throttle actuator control module output
- Inspect the torque management request input B wiring for chafe
- Clear the code and retest
Look up another code
Enter a full code or a symptom. Press / to search. How to read a code
Type a code above, or start from a symptom or a common code.
Updated
Generic SAE J2012 definition. Last updated 2026-10-10.