HELP! I need to smog the Heep and it's throwing up codes P0300, P0305 & P0320. What's crazy is it's running perfect. I changed the CPS, Plugs, Plug Wires, Cap, Rotor and just now the Cat Converter and O2 sensor. Still no love. After spending about 500 bucks chasing a stupid light on the dash my Jeep still runs the same, Perfect. Any insight?
Help with codes P0300, P0305 & P0320
-OlllllO-
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If you haven't reset the PCM then I'd try doing that and see if anything pops back up over the next day or two of driving. I like the piece of mind of deleting them myself instead of letting the jeep do it on it's own, especially if you are about to spend more money on another sensor. Also, if the CEL does come back on it will hopefully help you narrow down the list by only giving one code instead of still having the old codes in memory...
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