Error code
OBD2 P2551
OBD2P2551
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Torque Management Request Input Signal 'B' High.
Severity
moderateCan drive, but performance issues may occur.
Summary
P2551 indicates that the input signal B for torque management is too high, which could be related to issues in the engine control module (ECM) or transmission control module (TCM).
Common Causes
- Wiring short to positive
- Faulty ECM
- Faulty TCM
Fixes
FAQ
What does P2551 mean?
P2551 indicates an issue with the torque management request input signal B being too high, likely due to wiring or module issues.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
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