P2551

Torque Management Request Input Signal B High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–89 (est.)

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

P2550 P2552 P2122