Engine derated?

Tiny
DAVENPORT
  • MEMBER
  • 2019 CHEVROLET EQUINOX
  • 1.5L
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 48,000 MILES
Great little car. Zero problems until now. Loaned car to granddaughter. Came back derated. Codes said wheel sensors - replaced. Then Pedal sensor - replaced twice. Then throttle body - replaced. Then still would not communicate with the ECM - replaced. Still doesn’t communicate. Please help!
Tuesday, July 8th, 2025 AT 4:04 PM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 52,273 POSTS
The ECM will not communicate if you have a fuse out. I would check the ECM and ECM? TCM fuses under the hood and the fuse #6 in the battery fuse panel near the battery (250amp). This guide can show you how:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Also, check the "DLC left" fuse in the fuse panel on the left side of the dash. You might want to go over this video as well:

https://www.youtube.com/watch?v=6Tlg3JmgNSQ

Please go over these guides and get back to us.
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Wednesday, July 9th, 2025 AT 6:38 PM
Tiny
DAVENPORT
  • MEMBER
  • 2 POSTS
Thank you, Ken L. We will check the fuses as you have directed and report back. Appreciate your help immensely!
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Thursday, July 10th, 2025 AT 12:45 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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Sounds good :) have a good day!
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Thursday, July 10th, 2025 AT 9:46 AM

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