P0588
Cruise Control Vent Control Circuit High
Cruise control
Generic OBD-II
Low
What it means
P0588 means the cruise control vent control circuit is reading higher voltage than expected, usually from a wiring fault or a bad vent solenoid. On systems that use a vacuum servo, this vent circuit helps regulate the throttle actuator. The fault disables cruise control but does not affect normal driving.
Low
Can I keep driving? Safe to drive — only the cruise control is affected; normal driving is unaffected.
Common symptoms
What you'll notice
- Cruise control does not function
- Cruise control cannot be set or held
- Cruise control warning light on the dash
- Check-engine light on
Common causes
Most likely first
- Faulty cruise control vent control valve/solenoidLikely
- Damaged wiring or connectors in the vent control circuit (high voltage)Common
- Loose or corroded electrical connectionsCommon
- Failed engine control module (ECM), least likelyLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and confirm the vent control circuit voltage is high.
- Inspect the vent control solenoid connector and wiring for a short to voltage or an open.
- Test the vent control solenoid resistance against spec.
- Repair damaged wiring and clean or tighten corroded connections.
- Replace the vent control solenoid if faulty, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0588?+
Yes. The engine and brakes are unaffected. Only cruise control is disabled until the vent control circuit is repaired.
Can I just clear P0588?+
It will return while the circuit reads high. Fix the wiring or solenoid to clear it for good.
Related codes
Often seen with P0588
Read & clear P0588 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX