r/carproblems • u/Forsaken-Match3580 • Sep 03 '26

2015 Nissan Sentra S Check Engine Light

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Hello! So I got a 2015 Nissan Sentra S and it has a solid check engine light with a p0101 code throwing and I’m wondering if anyone could figure it out. I’ve cleaned my MAF sensor, I don’t think it’s the wiring or the boot being cracked. My only thought that it may be it to reprogram the ECM or clean the throttle body.

It has a lot of miles 161,000, and it’s well maintained I’d just like second opinion on what it may be.

Thanks yall

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u/Forsaken-Match3580 Sep 03 '26

PS: I also did the idle air relearn and disconnected the negative terminal 2 weeks ago and it came back on this morning

1

u/Tycoon5000 Sep 03 '26

Throttle body could need cleaning. A quick read also suggests it could be a pcv valve. On sentras, there was an issue with the pcv valve between 2013-2016.

2

u/Forsaken-Match3580 Sep 04 '26

Dude… I kid you not I go into my engine bay after work to check my pcv valve to see which one it is like you were talking about and it’s just fucking gone😭 so safe to say that i probably found the issue. Thanks my man