TorqueMech OBD Code Guide
P0591 - Cruise Control Multi-Function Input B Circuit Low
The cruise-control multi-function input B signal is lower than expected.
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Code Overview
The cruise-control multi-function input B signal is lower than expected.
Common Causes
- Cruise-control switch or servo fault
- Damaged wiring or connector
- Intermittent control-circuit issue
Diagnostic Steps
- Inspect cruise-control switch and servo circuits
- Watch input or control data if supported
- Check connector condition and continuity
Related OBD Codes
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Next Steps
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