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I'm having an odd issue after having a bad thermostat for 10k miles. When I go to complete the emissions cycle with a good thermostat I get super weird codes that I don't get with the emissions testing incomplete.
The car only has 40k miles on it atm. Everything but the battery is OEM mopar.
If you are familiar with the emissions cycle for the car - for one of the tests it needs ~5 runs between 30 and 40 mph with a stop and idle session for 30 seconds between each run. When I do this - on the 4th or 5th attempt I get P0038, P0030, P0522. (bad oil press switch and bad 02 sensor circuit.) I've driven the car for two years a few blocks and back home without ever letting it try this and it has never once thrown these codes in 10k miles of driving. We only took the car on trips in the winter time and the low temps kept the emissions testing cycles from even starting.
So yes, the car has a decent amount of miles on with a very low coolant temp, which I know is not good.
Then the car starts to misfire out of nowhere when the emissions system throws its codes.
Then I get P0201, 202, 203, and 204. - circuit fault out of all four injectors.
It's insane. I've taken the car on hundred mile drives with the emissions testing just flat out in not ready mode and never had a single misfire. When I shut off and restart after all of the injectors throw codes - the car runs perfectly. Really thinking its an electrical prob.
When I datalog the car and its not in emissions testing - the coolant temp hits 195, then drops to 191ish after the thermostat opens and just goes back and forth slowly. The oil pressure switch stays in "high value".
I need to datalog while doing the emissions testing, obviously. Just checking if anyone has seen this type of behavior before. I saw no precedence when I did a search.
The car only has 40k miles on it atm. Everything but the battery is OEM mopar.
If you are familiar with the emissions cycle for the car - for one of the tests it needs ~5 runs between 30 and 40 mph with a stop and idle session for 30 seconds between each run. When I do this - on the 4th or 5th attempt I get P0038, P0030, P0522. (bad oil press switch and bad 02 sensor circuit.) I've driven the car for two years a few blocks and back home without ever letting it try this and it has never once thrown these codes in 10k miles of driving. We only took the car on trips in the winter time and the low temps kept the emissions testing cycles from even starting.
So yes, the car has a decent amount of miles on with a very low coolant temp, which I know is not good.
Then the car starts to misfire out of nowhere when the emissions system throws its codes.
Then I get P0201, 202, 203, and 204. - circuit fault out of all four injectors.
It's insane. I've taken the car on hundred mile drives with the emissions testing just flat out in not ready mode and never had a single misfire. When I shut off and restart after all of the injectors throw codes - the car runs perfectly. Really thinking its an electrical prob.
When I datalog the car and its not in emissions testing - the coolant temp hits 195, then drops to 191ish after the thermostat opens and just goes back and forth slowly. The oil pressure switch stays in "high value".
I need to datalog while doing the emissions testing, obviously. Just checking if anyone has seen this type of behavior before. I saw no precedence when I did a search.