P0587
Cruise Control Vent Control Circuit Low
Cruise control
Generic OBD-II
Low
What it means
P0587 means the ECM detected a low-voltage (short-to-ground or open) condition on the cruise control vent solenoid circuit, the valve that bleeds vacuum to control cruise speed on vacuum-actuated systems. It stops cruise control from holding speed properly but has no effect on how the engine runs or how the car brakes and steers.
Low
Can I keep driving? Safe to drive — only cruise control is affected; the engine, brakes, and steering are unaffected.
Common symptoms
What you'll notice
- Cruise control will not hold a set speed or will not engage
- Cruise control indicator or check-engine light may be on
- Cruise speed drifts or drops out
- No effect on normal engine performance
Common causes
Most likely first
- Faulty cruise control vent (vacuum) solenoidLikely
- Short to ground or open in the vent solenoid control wiringCommon
- Corroded or loose connector at the solenoidCommon
- Less commonly, a faulty ECMLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data to see the conditions when it set.
- Inspect the vent solenoid connector and control wiring for a short to ground or open.
- Measure the solenoid's resistance and compare to spec.
- Replace the cruise control vent solenoid if it is out of range.
- Repair any wiring faults, then clear the code and re-test.
FAQ
Quick answers
Is it safe to drive with P0587?+
Yes. The fault only disables or disrupts cruise control; engine, braking, and steering are all normal.
Can I just clear P0587?+
It will return until the solenoid or its wiring is repaired. Clearing alone doesn't fix the low-circuit fault.
Related codes
Often seen with P0587
Read & clear P0587 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