2001 expediton 85000
I got the code today. Auto zone doesnt know what it is.
The paper said Idle Air Control System Underspeed error. What does it mean. Thanks, Steve
Saturday, November 17th, 2007 AT 11:20 AM
1 Reply
MERLIN2021
MECHANIC
17,250 POSTS
What it means is the RPM's are lower than the PCM wants, IAC valve or circuit should be checked, and or a clogged intake airway? How is your air filter?