What is the issue P0697 code?

2012 BUICK REGAL

145,000 MILES

KEITH BEAL

MEMBER
1 POST

P0697 I'll replace the mass air flow sensor I also replaced all the relays And new air filter install I also did a hard reset by unplugging the battery terminals and letting it sit for over 40 minutes to reset the computer and it's still pops up the same code.

Jun 19, 2024 at 3:15 PM

STRAILER

✓ASE Certified Mechanic
54,832 POSTS

The P0697 code is related to the sensor reference voltage. Specifically, this code indicates a problem with the "Sensor Reference Voltage 'C' Circuit Low."

It sounds like the battery is bad or the voltage sensor has gone out, here is a guide to help you load test the battery or you can take it to the auto parts store for testing.

https://www.2carpros.com/articles/car-battery-load-test

Clear the codes once the repair has been completed. Check out the images (below). Let us know if you need anything else.

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
Click here to log in and view diagram.

Jun 19, 2024 at 7:11 PM

KEITH BEAL

MEMBER
1 POST

man, it was the voltage sensor this little part. man, it has been ordered and thank you,

Jun 20, 2024 at 9:15 AM

STRAILER

✓ASE Certified Mechanic
54,832 POSTS

Thanks for letting us know, we are here to help, please use 2CarPros anytime.

Jun 20, 2024 at 9:16 AM