Torque Management Feedback Signal B Range/Performance
The P2641 code means the vehicle's onboard diagnostic system has detected: Torque Management Feedback Signal B Range/Performance. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $100 - $800 (parts and labor)
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What Are the Symptoms of P2641?
- Secondary torque signal out of range
- Stability control intervention issues
- Cruise control inconsistency
- Check engine light on
What Causes P2641? (Most Likely First)
- ECM B torque calculation error Very High
- Sensor input used for B signal inaccurate High
- Communication delay on CAN bus Moderate
- TCM B signal input circuit issue Low
Can I Still Drive with P2641?
Short distances only. P2641 is rated moderate severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
Frequently Asked Questions
What is torque signal B vs signal A?
Some vehicles use redundant torque signals (A and B) for safety. Signal B provides a cross-check to verify signal A accuracy.
Can CAN bus delays cause P2641?
Yes. If the B signal is delayed due to CAN bus congestion or wiring issues, it may not match the A signal, triggering a range/performance code.
Is P2641 urgent?
Not immediately dangerous, but stability and traction control systems may not function optimally. Repair at your earliest convenience.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P2641?
-
Compare torque signal A and B for consistency
-
Check all sensors involved in torque calculation
-
Monitor CAN bus for communication delays
-
Verify TCM B input circuit
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Which Vehicles Commonly Get P2641?
- 2010-2020 Ford F-150
- 2011-2020 Chevrolet Silverado
- 2012-2019 Ram 1500
- 2010-2018 Toyota Tundra
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