P0565
Cruise Control On Signal
The ECU detects an implausible state of the cruise control on/off signal - either the master switch is stuck on, intermittent, or shows a logic level that does not match other dash signals.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: easy
Common causes
Ordered by how often each turns out to be the cause.
- Master switch stuck closedCommon
Parts involved
- Cruise Master Switch
P0565 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.