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 wiring between EGR valve 6-pin harness connector terminal "E" and PCM 30-pin harness connector terminal "4E" (Red/Green wire)
- Open circuit in wiring between EGR valve 6-pin harness connector terminal "A" and PCM 30-pin harness connector terminal "4H" (Pink wire)
- Open circuit in wiring between EGR valve 6-pin harness connector terminal "B" and PCM 30-pin harness connector terminal "4K" (Gray wire)
- Open circuit in wiring between EGR valve 6-pin harness connector terminal "F" and PCM 30-pin harness connector terminal "4N" (Yellow wire)
- Open circuit in wiring between main relay terminal "D" and EGR valve 6-pin harness connector terminal "C" (White wire)
- Open circuit in wiring between main relay terminal "D" and EGR valve 6-pin harness connector terminal "D" (White wire)
- PCM malfunction
- Short to power circuit in wiring between EGR valve 6-pin harness connector terminal "E" and PCM 30-pin harness connector terminal "4E" (Red/Green wire)
- Short to power circuit in wiring between EGR valve 6-pin harness connector terminal "A" and PCM 30-pin harness connector terminal "4H" (Pink wire)
- Short to power circuit in wiring between EGR valve 6-pin harness connector terminal "B" and PCM 30-pin harness connector terminal "4K" (Gray wire)
- Short to power circuit in wiring between EGR valve 6-pin harness connector terminal "F" and PCM 30-pin harness connector terminal "4N" (Yellow wire)
- Short to ground circuit in wiring between EGR valve 6-pin harness connector terminal "E" and PCM 30-pin harness connector terminal "4E" (Red/Green wire)
- Short to ground circuit in wiring between EGR valve 6-pin harness connector terminal "A" and PCM 30-pin harness connector terminal "4H" (Pink wire)
- Short to ground circuit in wiring between EGR valve 6-pin harness connector terminal "B" and PCM 30-pin harness connector terminal "4K" (Gray wire)
- Short to ground circuit in wiring between EGR valve 6-pin harness connector terminal "F" and PCM 30-pin harness connector terminal "4N" (Yellow wire)