Powertrain Definition only Lights the check engine lamp

P2641: Torque Management Feedback Signal B

Standardized SAE J2012 code · P26xx — Computer and output circuits

What does P2641 mean?

The torque feedback signal B from a second torque user is missing or invalid. The engine controller cannot coordinate torque reduction with this user.

The code tells you which monitor failed, not which part is broken. Test before replacing parts.

Common causes

  • High Required CAN message not received in time
  • Medium Source module reports an internal fault

Likelihood is a general estimate across vehicles; your make and model may differ.

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P2641 in the community

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