Possible Causes
WARNING: This page is about a different car, the 2003 Mazda Protege5 and 2003 Mazda Protege. However, it is still accessible from the selected car via links, so may be relevant.
- IAT sensor malfunction.
- IAT signal and ground circuits shorted to each other.
- PCM malfunction.
- Short circuit between IAT sensor and PCM.