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:
- OCV malfunction
- Open circuit in White wire between main relay and OCV 2-pin harness connector terminal "B"
- Open circuit in Brown/Yellow wire between OCV harness connector terminal "A" and PCM 30-pin harness connector terminal "4M"
- PCM malfunction
- Poor connection of harness connectors at PCM and/or OCV
- Short circuit to ground in Brown/Yellow wire between OCV harness connector terminal "A" and PCM 30-pin harness connector terminal "4M"