P0591 - Cruise Control Multi-Function Input B CKT Range/Perf

What does P0591 mean?

This code means the range or performance of the cruise control multi-function input 'B' circuit is outside of acceptable limits. The signal is not within the expected parameters.

• Incorrect switch operation
• Wiring issues affecting signal strength
• Control module reading error

Click steps to track your progress.

1. 1

   Verify the multi-function switch is functioning correctly.

2. 2

   Inspect wiring for resistance or voltage drop issues.

3. 3

   Check if the control module is receiving accurate data.

4. 4

   A qualified mechanic can help diagnose this further.