Codes P015B, P0171, and P2270?

2018 CHEVROLET MALIBU HYBRID
44,000 MILES • 1.8L • 4 CYL • 2WD • AUTOMATIC
Avatar
KEVIN CONSTAANTINE
  • MEMBER
  • 3 POSTS
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
Mar 28, 2023 at 12:15 PM
Advertisement
Avatar
KEVIN CONSTAANTINE
  • MEMBER
  • 3 POSTS
Drive Cycle-3 image from scan tool. ECM deleted code P2270.
Mar 28, 2023 at 2:46 PM
Avatar
KEVIN CONSTAANTINE
  • MEMBER
  • 3 POSTS
Image from drive cycle-3.
Mar 28, 2023 at 2:48 PM
Advertisement
Avatar
STRAILER
  • CERTIFIED EXPERT
  • 53,854 POSTS
The P015B code oxygen sensor circuit for bank 1 sensor 1

P0171 code lean air-fuel mixture on bank 1

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.
Mar 29, 2023 at 11:20 AM