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post #1 of 3 (permalink) Old 07-09-2019, 03:30 AM Thread Starter
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All the way from Guam

Hello to all! Recently picked up a 2002 IS300 that had a manual trans swap done. Car runs great, except on initial start up it runs rough but doesnít throw any misfire codes, it does have a P0340 code that always comes back on. I checked ohm reading checks out, and continuity of wires from sensor to ecu is good. I also checked crank sensor resistance and wiring to ecu and that is good as well. Iím running out of ideas of what else could be causing the rough idle on start up and throwing a P0340 code. Any help would be greatly appreciated. Note: I also replaced the ECU with a replacement I got from eBay. Same problem persists.
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post #2 of 3 (permalink) Old 07-09-2019, 05:44 AM
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Replace the sensor. Try to post in one area. it may help with getting responses. Multiple area posts on the same issue. Does not speed things up.

Careful & Consistent
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post #3 of 3 (permalink) Old 07-12-2019, 04:14 AM
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Welcome!!

After 13 years, I finally got my IS300... and an ISF in the same week. Lexus Fam!
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