Cruise Control Input Circuit
P0575 indicates the ECM detected a malfunction in the cruise control input circuit, preventing proper signal communication between the cruise control switches and the engine control module. This is a non-critical issue that disables cruise control functionality but does not affect normal engine operation or driveability.
What You Might Notice
- Cruise control system inoperative or unresponsive
- Cruise control buttons do not function
- Check engine light (CEL) illuminated
- Inability to set or maintain cruise speed
- Cruise control mode unavailable in instrument cluster
Most Common Causes
- 1
Faulty cruise control switch
The cruise control switch assembly on the steering wheel may be defective or stuck, sending incorrect signals to the ECM. This is the most common cause of P0575.
- 2
Wiring or connector issues
Damaged, corroded, or loose wiring and connectors in the cruise control circuit can interrupt signal transmission to the ECM.
- 3
ECM software malfunction
The engine control module may have a software glitch or calibration issue causing it to misinterpret cruise control input signals.
- 4
Damaged steering wheel contact assembly
Internal wiring or contact points within the steering wheel's electrical assembly may be broken or worn, preventing signal delivery.
How to Diagnose It
- 1
Check Faulty cruise control switch — The cruise control switch assembly on the steering wheel may be defective or stuck, sending incorrect signals to the ECM. This is the most common cause of P0575.
- 2
Check Wiring or connector issues — Damaged, corroded, or loose wiring and connectors in the cruise control circuit can interrupt signal transmission to the ECM.
- 3
Check ECM software malfunction — The engine control module may have a software glitch or calibration issue causing it to misinterpret cruise control input signals.
- 4
Check Damaged steering wheel contact assembly — Internal wiring or contact points within the steering wheel's electrical assembly may be broken or worn, preventing signal delivery.
How to Fix It
- 1
Replace cruise control switch
Remove the steering wheel trim and replace the faulty cruise control switch assembly. Test all cruise control functions after installation.
- 2
Inspect and repair wiring harness
Locate the cruise control circuit wiring, inspect for damage, corrosion, or loose connections. Repair or replace damaged sections and reconnect loose terminals securely.
- 3
Clean electrical connectors
Disconnect and clean all cruise control circuit connectors with electrical contact cleaner to remove corrosion and improve signal transmission.
- 4
ECM reprogramming or replacement
If wiring and switches are confirmed good, reprogram the ECM with updated software or replace the module if internal failure is detected.
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