Severity: Low
Safe to drive. Schedule a diagnosis soon.
What P0505 means
Idle control system is not achieving the target idle speed.
Symptoms
- Idle too high or too low
- Stalling
Common causes
Most likely first
- 1Dirty throttle body
- 2Vacuum leak
- 3Failed idle air control valve (older vehicles)
How we diagnose it
- Clean throttle body and perform idle relearn
- Smoke test
Every vehicle sets codes under its own conditions. We check the factory diagnostic steps and service bulletins for your VIN, so the repair targets the actual cause.