P0566 Fault Code

Cruise Control Off Signal Malfunction

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0566 fault code indicates a malfunction related to the cruise control system, specifically the cruise control off signal. This signal is crucial for the proper operation of the cruise control, informing the system when it should disengage. A fault in this area can lead to unwanted behaviors or inoperability of the cruise control feature.

What are the symptoms of the P0566 code?

Common symptoms associated with a P0566 fault code include:

• Cruise control not engaging or disengaging unexpectedly.
• Illuminated dashboard warning lights, including the check engine light.
• Unresponsive cruise control lever or switch.
• Inconsistent engine performance or power delivery when cruise control is engaged.

What causes the P0566 code?

Several issues can lead to a P0566 fault code, including:

• Faulty cruise control switch that fails to signal the module.
• Damaged wiring or connectors in the cruise control circuit.
• Malfunctioning Engine Control Module (ECM) or Powertrain Control Module (PCM).
• A blown fuse related to the cruise control system.

How to fix P0566?

To fix the P0566 fault code, the following steps are recommended:

• Inspect the cruise control switch for proper function and replace if necessary.
• Check wiring and connectors for signs of damage or corrosion, repairing or replacing as needed.
• Test the ECM/PCM for faults, reprogramming or replacing if it is found to be faulty.
• Ensure all related fuses are intact and replace any that are blown.