DTC U121F Infiniti
Idle Speed Too High
Idle Speed Too High
Description
ECT sensor from 158-230ºF, engine running with the closed throttle position switch indicating the throttle is closed, and the PCM detected the Actual idle speed at least 200 rpm more than the Desired idle speed during the IAC Diagnostic test.
Video Guide
Diagnostic Info
- DTC Code: U121F
- Brand: Infiniti