Error code

OBD2 P2643

OBD2P2643
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Torque Management Feedback Signal 'B' Low.

Severity

moderateCan drive, but performance issues may occur and worsen over time.

Summary

P2643 indicates that the feedback signal B from the torque management system is too low, which could be related to wiring issues or problems with the ECM (Engine Control Module) or TCM (Transmission Control Module).

Common Causes

  • Wiring short to ground
  • ECM malfunction
  • TCM malfunction

Fixes

FAQ

What does P2643 mean?

P2643 indicates a low feedback signal B from the torque management system, which can be caused by wiring issues or problems with the ECM or TCM.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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