P0697: Sensor Reference Voltage C Circuit/Open
What Does P0697 Mean?
P0697 is a diagnostic trouble code indicating: Sensor Reference Voltage C Circuit/Open. This code relates to the computer and output circuits system. It has been reported in NHTSA complaints across 1 different vehicle models.
Symptoms of P0697
- ⚠️ Vehicle enters limp/reduced power mode
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"Trouble code p2138. Replaced accelerator pedal with OEM. Trouble code still persists. Car goes into limp mode while driving posing a safety concern. There is a TSB 07-06-04-019F. Other codes include p0301 and p0697. After limp mode I have to pull over and turn car completely off and crank it up agai"
— Chevrolet Equinox owner, 03/05/2024
Source: NHTSA Complaints Database
Most Reported Vehicles for P0697
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | CHEVROLET EQUINOX |
Frequently Asked Questions
Does this mean my car's computer is bad?
How much does an ECM replacement cost?
What To Do Next
Possible Fixes
- 🔧 Have the code scanned with a professional-grade scanner to read freeze frame data
- 🔧 If DIY repair isn't feasible, get a diagnostic from a trusted mechanic ($50-150)
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1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
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3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.