OBD
P050A
Cold Start Idle Control System Performance
What it means
P050A means Cold Start Idle Control System Performance.
Check these first
- A dirty idle air control valve on cold start
- A failed engine coolant temperature sensor
- An intake leak that leans the cold start
- A failing oxygen sensor
What to do next
- Watch cold start idle on a scan tool and compare to the target
- Clean or replace the idle air control valve
- Check the coolant temperature sensor reading against a cold engine
- Smoke test the intake for a leak
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.