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Powertrain / Under The Hood • Intermittent P0430

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VERY intermittent. After a year of keeping an eye on it, I have a partial pattern. If I'm on the highway, and have to punch it to get out and around a car, it will pop up shortly afterward. Other times the car has idled for a while, and it pops up when I get on the road. Other times it will pop up after a few blocks down the street from a cold start.

But not always.

Car has a little over 230k on the engine, and uses about a quart of oil every oil change, roughly every 5k - 7k. I travel all over the country, so 90% of the miles are interstate or US highway. I replaced the purge solenoid just in case, and it's easy to get to. No change.

To my best recollection, I have never gotten a Bank 1 error, only the P0430 Bank 2 error. The car will hopefully be retired this summer or fall, but it still bugs me what is causing the intermittent error.

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