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.
- Connector or terminal malfunction.
- EGR boost sensor signal circuit is shorted to reference voltage supply circuit.
- Open or short circuit between EGR boost sensor and PCM.
- PCM malfunction.