Check Engine Light code was P2A01?

Tiny
RPJ
  • MEMBER
  • 2008 CHEVROLET AVEO
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 189,000 MILES
Hello,

The C.E. Light was on in my vehicle and a local parts store checked it and the code was P2A01 signaling an O2 sensor issue.

The CE light was on for about 14 days and suddenly went out on 11/8/25. Should I still have a shop look at this or wait until the light comes back on.

Thanks,

Roosevelt.
Sunday, November 9th, 2025 AT 4:40 PM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
I would clear the codes and wait until the light comes back on. This might be a glitch in the system or the car has traveled up a long hill, if the code comes back replace the oxygen sensor behind the catalytic converter and clear the code again which should fix the problem. This guide can help walk you though the repair

https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor

Please go over this guide and get back to us.
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Tuesday, November 11th, 2025 AT 10:11 AM
Tiny
RPJ
  • MEMBER
  • 99 POSTS
Thank you very much Ken! I always appreciate your help.

I'll let you know what happens.

Roosevelt.
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Tuesday, November 11th, 2025 AT 11:57 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
No problem, we are here to help :)
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Wednesday, November 12th, 2025 AT 11:26 AM

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