Possible Causes
WARNING: This page is about a different car, the 2002 Mazda B4000, 2002 Mazda B3000, and 2002 Mazda B2300. However, it is still accessible from the selected car via links, so may be relevant.
Possible causes are:
- Vacuum leak.
- Damaged IAC valve.
- Damaged PCM.
- Damaged throttle body.
- IAC circuit short to GND.
- IAC valve stuck open.