I also have a 2013 toyota corolla, I changed the spark plugs, I removed the throttle body and cleaned it, I replaced the air sensor, replaced the air filter, etc... and I have the same issue, when the car warms up, when I stop and it's in idle, it will rough idle (between 600 and 800 rpm) for like a second and go back to normal, and do it over and over again...
I had a 2016 SR5 (bought brand new) with 98k miles that started having electrical/sensor issues. No problems at all previous to that point and kept an impeccable service record. Even the dealership couldn’t figure it how to fix the issue after 10 months (& thousands of $) spent replacing sensors, checking wires, replacing the throttle body, etc. Next step would have been paying for a whole new wiring harness & it wasn’t a guaranteed fix. The service manager actually recommended I clear the code & trade it in. So, I did, as much as I didn’t want to get rid of it. Now I’m in a 2020 TRD ORP (used) with 28k miles. Fingers crossed no more electrical issues. ???????? I have loved both my 4Runners!
and $500 for a new throttle body that I replaced myself, took less than 10 minutes
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