Cruise Control Multi-Function Input B Circuit
The P0585 code means the vehicle's onboard diagnostic system has detected: Cruise Control Multi-Function Input B Circuit. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $50 - $400 (parts and labor)
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What Are the Symptoms of P0585?
- Check Engine Light on
- Cruise control B input circuit malfunction
- Cruise control system inoperative
- No response from cruise control buttons
What Causes P0585? (Most Likely First)
- Faulty cruise control multi-function switch B Very High
- Wiring damage or corrosion in the circuit High
- Poor connector contact or backed-out pins Moderate
- ECM or control module circuit failure Low
Can I Still Drive with P0585?
Yes, but fix soon. P0585 is rated low severity. It is not an immediate stop-driving fault, but it will not clear itself — book the repair rather than ignoring the light.
Frequently Asked Questions
What does P0585 mean?
P0585 indicates a malfunction in the cruise control multi-function input b circuit. This prevents the cruise control system from operating correctly.
Can I still drive with this cruise control code?
Yes. Cruise control codes do not affect normal vehicle operation. The vehicle drives normally; only the cruise control convenience feature is affected.
Should I fix a cruise control code right away?
Cruise control codes are low priority for drivability and safety. However, the Check Engine Light may mask other more serious codes. Consider diagnosis when convenient.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P0585?
-
Use a scan tool to read Cruise Control Multi-Function Input B related data
-
Inspect all related wiring and connectors for damage, corrosion, or loose connections
-
Measure circuit voltage and resistance to identify opens, shorts, or high resistance
-
Command the affected component with a scan tool to verify it responds to ECM commands
Sources 1
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)
Which Vehicles Commonly Get P0585?
- 2008-2018 Ford F-150
- 2010-2020 Toyota Camry
- 2009-2019 Honda Accord
- 2011-2020 Chevrolet Silverado
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