Code PO332 after cold air intake install

Tiny
SHANETAYLOR337
  • MEMBER
  • 2002 CHEVROLET TAHOE
  • 5.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 247,000 MILES
I have the SUV listed above that I have recently installed a spectre cold air intake on. I have driven it only a few miles and I got code po332 on my diagnostic machine after the check engine light came on. Could the cai system I just installed be the culprit and if so would a high performance mass air flow sensor fix the issue or do I need some other item to make the cai operate or should I just put my factory intake system back on?
Monday, May 18th, 2020 AT 10:46 AM

4 Replies

Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I'm Danny.

Actually that code is unrelated to a MAF (mass air flow sensor). Code P0332 is a knock sensor issue. The knock sensors (2) are underneath the intake manifold and are sometimes prone to failure on these 5.3 engines. I've attached picture diagnostic steps below and location for your Tahoe. Hope this helps and thanks for using 2CarPros.
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Monday, May 18th, 2020 AT 2:48 PM
Tiny
STEVE W.
  • MECHANIC
  • 13,073 POSTS
Okay, that was different. Typed up a part of the answer and poof it all vanished. To add on, the CAI could cause an issue but not in the way you might think, the knock sensors are a common issue on these engines and it's likely you moved the wiring while installing the CAI. That set the code. Follow Danny's post and test the sensors and their wiring.
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Monday, May 18th, 2020 AT 3:05 PM
Tiny
SHANETAYLOR337
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  • 11 POSTS
As a new user of 2CarPros I must say that this is a great site and I would recommend it to anyone. And thanks to the experts who responded, your answers were very knowledgeable and prompt. Thanks again experts and 2CarPros.
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Wednesday, May 20th, 2020 AT 10:42 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
You're welcome!
Let us know how things turn out with your truck or have any further questions on this issue. Thanks again for using 2CarPros.

Danny-
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Wednesday, May 20th, 2020 AT 11:29 PM

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