High Idle: OBD2 Diagnosis Path
Warm idle speed remains above normal target RPM. Start with the related code pages below, then use scanner and guide pages to narrow down root cause and reduce unnecessary parts swaps.
Tool for this symptom
Code reader for a check engine light — see what the tool has to be able to do before you buy one.
Code reader for a check engine lightMost Related OBD2 Codes
Tip: if your exact code is still unknown, start at OBDHacks scanner input and then return to this symptom cluster for deeper troubleshooting.