Cruise Control Set Signal Malfunction
P0568 indicates the cruise control 'Set' signal is not being properly received or transmitted by the engine control module. This code sets when the ECM detects a malfunction in the cruise control set button circuit or its signal pathway, preventing the cruise control system from engaging or maintaining a set speed.
What You Might Notice
- Cruise control light does not illuminate on dashboard
- Cruise control system will not engage or activate
- Unable to set or maintain a desired cruise control speed
- Cruise control speed erratic or fluctuates unexpectedly
- Individual cruise control functions inoperative (Resume, Set, Accel, Coast buttons)
Most Common Causes
- 1
Defective cruise control switch
The cruise control set button or switch assembly is faulty, damaged, or worn out, preventing proper signal transmission to the ECM.
- 2
Damaged or corroded connector
Loose, corroded, or improperly seated connectors in the cruise control circuit are not making reliable electrical contact with the switch or wiring harness.
- 3
Chafed or damaged wiring harness
Wires in the cruise control harness are broken, shorted, or have high resistance due to abrasion, pinching, or age-related degradation.
- 4
Contaminated switch assembly
Liquid spillage (coffee, soda, juice) or debris has entered the cruise control switch, causing intermittent contact or complete failure.
How to Diagnose It
- 1
Check Defective cruise control switch — The cruise control set button or switch assembly is faulty, damaged, or worn out, preventing proper signal transmission to the ECM.
- 2
Check Damaged or corroded connector — Loose, corroded, or improperly seated connectors in the cruise control circuit are not making reliable electrical contact with the switch or wiring harness.
- 3
Check Chafed or damaged wiring harness — Wires in the cruise control harness are broken, shorted, or have high resistance due to abrasion, pinching, or age-related degradation.
- 4
Check Contaminated switch assembly — Liquid spillage (coffee, soda, juice) or debris has entered the cruise control switch, causing intermittent contact or complete failure.
How to Fix It
- 1
Inspect and clean cruise control switch
Examine the cruise control switch on the steering wheel or stalk for visible damage, contamination, or corrosion. Clean with electronic contact cleaner if contaminated; replace if damaged or non-responsive.
- 2
Check and reseat connectors
Locate the cruise control switch connector(s) and harness connections. Disconnect, inspect for corrosion or damage, clean terminals, and reseat firmly ensuring a positive connection.
- 3
Inspect cruise control harness
Visually trace the cruise control wiring harness from the switch to the steering column and ECM connection. Look for visible damage, chafing, cuts, or pinching. Repair with electrical tape or replace damaged sections.
- 4
Replace cruise control switch assembly
If inspection reveals a faulty switch, connector issues are resolved but code persists, or contamination damage is irreversible, replace the entire cruise control switch assembly with an OEM or quality aftermarket unit.
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