DTC U1021 Lincoln
Idle Speed Control System Low RPM
Idle Speed Control System Low RPM
Description
No ECT, EGR, Fuel Trim, IAT, IC Control, Injector, MAF, MAP, EVAP Purge, TP or VSS codes set, system voltage from 10-16v, ECT sensor signal over 120ºF, BARO sensor signal over 75 kPa, engine runtime over 125 seconds, throttle closed, vehicle speed less th
Cause and Solution
Air intake system leaks in the EGR or PCV system (PCV valve)Fuel delivery system is too lean or too rich during the testInspect the engine mounts for damage to the mountsInspect the throttle linkage adjustment and tensionInspect the thro
Video Guide
Diagnostic Info
- DTC Code: U1021
- Brand: Lincoln