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
- EGR valve malfunction
- Open circuit in Pink wire between EGR valve 6-pin harness connector terminal "A" and PCM 104-pin harness connector terminal No. 72
- Open circuit in Gray wire between EGR valve 6-pin harness connector terminal "B" and PCM 104-pin harness connector terminal No. 46
- Open circuit in Red/Green wire between EGR valve 6-pin harness connector terminal "E" and PCM 104-pin harness connector terminal No. 12
- Open circuit in Yellow wire between EGR valve 6-pin harness connector terminal "F" and PCM 104-pin harness connector terminal No. 56
- Open circuit in White wire between main relay harness connector terminal "C" and EGR valve 6-pin harness connector terminal "C"
- Open circuit in White wire between main relay harness connector terminal "C" and EGR valve 6-pin harness connector terminal "D"
- PCM malfunction
- Short to ground circuit in Gray wire between EGR valve 6-pin harness connector terminal "B" and PCM 104-pin harness connector terminal No. 46
- Short to ground circuit in Pink wire between EGR valve 6-pin harness connector terminal "A" and PCM 104-pin harness connector terminal No. 72
- Short to ground circuit in Red/Green wire between EGR valve 6-pin harness connector terminal "E" and PCM 104-pin harness connector terminal No. 12
- Short to ground circuit in Yellow wire between EGR valve 6-pin harness connector terminal "F" and PCM 104-pin harness connector terminal No. 56