P0581

Cruise Control Multi-Function Input A Circuit High

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$33–167 (est.)

Symptoms

Inability to activate cruise control
Spontaneous shutdown of cruise control
Check Engine Light Illuminates

Causes

Short circuit to +12V in the control circuit
Broken or damaged wiring harness
Malfunctioning brake/clutch switches
Problems with the cruise control module
Corrosion of contacts in connectors

How to Fix

Check the integrity of the cruise control system wiring harness
Measure resistance and voltage at circuit test points
Test the operation of the brake/clutch switches
Inspect and clean connector contacts
Replace damaged components if necessary

Related codes

P0571 P0572 P0573