Cruise Control Multi-Function Input Correlation Failure
The P0585 code indicates a correlation error between the cruise control multi-function input signals, typically from the steering wheel switches (SET, RESUME, CANCEL, etc.). The powertrain control module (PCM) detects that the signals from these switches do not match expected patterns, often due to a faulty switch, wiring issue, or a problem with the clock spring. This can disable the cruise control system.
01. Most Common Causes
- Faulty cruise control switch assembly
- Damaged clock spring in steering column
- Corroded or broken wiring in steering wheel circuit
- Faulty PCM (rare)
02. Symptoms You Will Notice
- Cruise control inoperative
- Cruise control light on dash may flash or stay on
- Intermittent cruise control operation
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to verify the code and check for additional codes.
Step 2: Inspect the cruise control switch assembly for physical damage or sticking buttons.
Step 3: Test the clock spring continuity with a multimeter while turning the steering wheel.
Step 4: Check wiring and connectors between the switch and PCM for shorts or opens.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
Yes, it is safe to drive, but cruise control will not function. The vehicle's normal braking and steering are unaffected.
How much does it cost to fix?▼
Typically $50-$150 for a switch replacement if DIY; labor at a shop can add $100-$200.