I’m having issues with EGR codes 31 and 33. I get code 31 when I run a KOEO test and 31 with 33 when I do a KOER test. I checked continuity between all three pins on the EGR position sensor and the corresponding pins on the ECM. Everything was good. I have 4.99 volts between the 5 volt reference and ground at the EGR position sensor. I also backprobed the signal pins on the ECU connector for the position sensor while running a KOER test. Voltage started out around .9 volts and ramped up to about 3.5 volts. I even jumped the 5 volt reference to the signal pin and still got codes 31 and 33!
None of this makes any sense. The EGR position sensor is working but these codes persist. Could my ECM be failing? This is my first car with eec-Iv so I don’t know if this is a common failure mode when they go bad.
My car is an 85 Crown Vic. Thanks!
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None of this makes any sense. The EGR position sensor is working but these codes persist. Could my ECM be failing? This is my first car with eec-Iv so I don’t know if this is a common failure mode when they go bad.
My car is an 85 Crown Vic. Thanks!
Sent from my iPhone using Tapatalk
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