Cruise Control Set Signal Malfunction
The P0568 code indicates that the powertrain control module (PCM) has detected a malfunction in the cruise control set signal circuit. This typically occurs when the set switch is stuck closed, the circuit is shorted to ground or voltage, or the PCM itself is faulty. The set signal is used to engage and maintain the desired cruising speed; when it malfunctions, the cruise control system may not operate correctly.
01. Most Common Causes
- Faulty cruise control set switch
- Short or open in the set signal circuit
- Corroded or damaged wiring/connectors
- Failed PCM (rare)
02. Symptoms You Will Notice
- Cruise control does not set or maintain speed
- Cruise control light on dash may flash or stay on
- Cruise control may disengage unexpectedly
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm the code and check for other related codes.
Step 2: Inspect the cruise control set switch for sticking or damage; test continuity with a multimeter.
Step 3: Visually inspect wiring and connectors for corrosion, shorts, or breaks.
Step 4: If wiring and switch are okay, test the PCM input for the set signal; replace PCM if necessary.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
Yes, the vehicle is generally safe to drive, but cruise control will not function properly. Avoid using cruise control until the issue is fixed.
How much does it cost to fix?▼
Typical repair costs range from $50 to $150, including parts and labor, depending on the cause (e.g., switch replacement vs. wiring repair).