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Codes P015B, P0171 and P2270?

Tiny
KEVIN CONSTAANTINE
  • MEMBER
  • 2018 CHEVROLET MALIBU HYBRID
  • 1.8L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 44,000 MILES
The codes listed above are present codes.
Things that have been done:
1. MAP sensor cleaned.
2. Dealer reprogrammed the interface module.
3. Both O2 sensors have been replaced.
4. Check engine light is on.

Performing the driving cycle all sensors have check in but the Cat and Evap. I only have 2 drive cycles done so far. The PCM has a permanent code logged for the P015B plus pending codes. All other codes are pending. Check engine light is on. Not sure what to do next.

Thanks
Kevin
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Tuesday, March 28th, 2023 AT 12:15 PM

3 Replies

Tiny
KEVIN CONSTAANTINE
  • MEMBER
  • 3 POSTS
Drive Cycle-3 image from scan tool. ECM deleted code P2270.
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Tuesday, March 28th, 2023 AT 2:46 PM
Tiny
KEVIN CONSTAANTINE
  • MEMBER
  • 3 POSTS
Image from drive cycle-3.
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Tuesday, March 28th, 2023 AT 2:48 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,959 POSTS
The P015B code indicates a problem with the oxygen sensor circuit for bank 1 sensor 1, while the P0171 code indicates a lean air-fuel mixture on bank 1, and the P2270 code indicates an issue with the oxygen sensor circuit for bank 1 sensor 2. The first thing I would do is inspect the car for rodent damage of the wiring to the PCM. If the wiring is intact, I would say the PCM has gone bad. Here is the location of the PCM and you can get a preprogrammed unit by searching Google or Ebay. Check out the images (below). Please let us know what you find.
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Wednesday, March 29th, 2023 AT 11:20 AM

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