P0525
Cruise Control Servo Control Circuit Range or Performance
The control circuit to the cruise control servo (vacuum or electric actuator that holds throttle position) shows feedback in plausible range yet inconsistent with the commanded action - servo slow, sticking, or supply weak.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Servo response slow due to wearCommon
- Vacuum supply low (vacuum servo)Possible
Parts involved
- Cruise Control Servo
P0525 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.