P2551
Torque Management Request Input Signal B High
P2551 is an OBD-II diagnostic trouble code meaning: Torque Management Request Input Signal B High. Common causes: malfunction of the accelerator pedal position sensor, torque control wiring harness damaged. Estimated repair cost: $17–89.
Symptoms
- Check Engine light comes on
- Reduced engine power
- Unstable engine idling
- Gear shifting problems (for automatic transmissions)
- Deterioration in acceleration dynamics
Causes
- Malfunction of the accelerator pedal position sensor
- Torque control wiring harness damaged
- Short circuit in signal circuit B
- Problems with the engine control unit (ECU)
- Corrosion or poor contact in connectors
How to Fix
- Check the condition and resistance of the accelerator pedal position sensor
- Inspect the wiring harness for damage and corrosion.
- Check the continuity of signal B using a multimeter
- Scan the control unit for additional errors
- If necessary, replace faulty components
Related codes
Error P2551 by Vehicle Brand
FAQ
What does the P2551 code mean?
P2551 is an OBD-II diagnostic trouble code that indicates: Torque Management Request Input Signal B High
What causes a P2551 error code?
The most common causes of P2551 include: Malfunction of the accelerator pedal position sensor; Torque control wiring harness damaged; Short circuit in signal circuit B; Problems with the engine control unit (ECU).
How do I fix a P2551 diagnostic trouble code?
To fix P2551: Check the condition and resistance of the accelerator pedal position sensor. Inspect the wiring harness for damage and corrosion.. Check the continuity of signal B using a multimeter. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2551?
Limited driving only, diagnose soon
How much does it cost to fix P2551?
The estimated repair cost for P2551 is $17–89. Actual cost depends on your vehicle, location, and labor rates.
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