Possible Causes
WARNING: This page is about a different car, the 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
Possible causes are:
- Connector or terminal malfunction
- ET control relay stuck closed
- PCM malfunction
- Short to ground circuit in Blue wire between ET control relay harness connector terminal "E" and PCM 104-pin harness connector terminal No. 19
- Short to power circuit in Pink wire between ET control relay harness connector terminal "C" and PCM 104-pin harness connector terminal No. 92