SPONSORED LINKS

Codes P0171 and P0172?

Tiny
KIMBERLEY COLTON
  • MEMBER
  • 2006 SUZUKI AERIO
  • 2.3L
  • AUTOMATIC
  • 124,500 MILES
My vehicle listed above SX model has started throwing the above codes. They both pull bank 1. I didn't notice any difference in driving at first, but it's starting to feel as if its having issues accelerating. I took pictures of the codes, as well as live scan. Just looking for ideas on what could be wrong before I go dumping too much money into it with the mechanic.
Images (Click to make bigger)
Thumb
Thumb
Thumb
Thumb
Thumb
Thumb
SPONSORED LINKS
Monday, May 1st, 2023 AT 9:04 PM

5 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,536 POSTS
Here is what is said about the codes:

The codes P0171 and P0172 refer to a problem with the fuel mixture in the engine.

P0171 is a "System Too Lean (Bank 1)" code,

P0172 is a "System Too Rich (Bank 1)" code,

The fact that it goes from to rich to the lean I need to ask of the exhaust system is in good shape no leaks. If so, is the engine misfiring? Can you upload a short video of how the engine is running? If everything is okay, I would replace the primary oxygen sensor. Here is the location, Check out the images (below). Please let us know what happens.
Images (Click to make bigger)
Thumb
Thumb
Thumb
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Tuesday, May 2nd, 2023 AT 9:52 AM
Tiny
KIMBERLEY COLTON
  • MEMBER
  • 3 POSTS
Everything seems to run okay. Same as it always has since I got the car in October anyway.
Video (Click to make bigger)
Thumb
Was this
answer
helpful?
Yes
No
Tuesday, May 2nd, 2023 AT 11:35 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,536 POSTS
Okay, because the system goes from rich to lean, I would replace the oxygen sensor (primary).

Here is a guide to help walk you through the steps:

https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor
Please let us know what happens.

Please go over this guide and report back.

Was this
answer
helpful?
Yes
No
Wednesday, May 3rd, 2023 AT 11:20 AM
Tiny
KIMBERLEY COLTON
  • MEMBER
  • 3 POSTS
Just wanted to respond now that I feel safe with the answer. I replaced the air filter because it was pretty gunked up, and then cleaned the MAF sensor. I cleared the codes, and it seems to be good to go.

Thank you for your help!
Was this
answer
helpful?
Yes
No
Tuesday, July 18th, 2023 AT 8:44 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,536 POSTS
Glad you could get it fixed, thanks for letting us know. Please use 2CarPros anytime we are here to help.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Thursday, July 20th, 2023 AT 10:17 AM

Please login or register to post a reply.

Sponsored links