AutoCodes – Generic – P0697

P0697 Code - Sensor Reference Voltage 'C' Circuit Open

Quick Answer

The control module has internal 5-volt reference buses called "5-volt reference". Common causes include Faulty Engine Control Module (ECM), ECM harness is open or shorted, ECM circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0697 indicates Sensor Reference Voltage 'C' Circuit Open.
Common causes: Common causes include Faulty Engine Control Module (ECM), ECM harness is open or shorted, ECM circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 30,796

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 06, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0697 Description

The control module has internal 5-volt reference buses called "5-volt reference". Each reference bus provided 5-volt reference circuit for more than one sensor. Therefore, a fault condition on one 5-volt reference circuit will affect the other 5-volt reference circuits connected to the reference bus. The control module monitors the voltage on the 5-volt reference buses.

OBDII Code P0697 - Sensor Reference Voltage 'C' Circuit Open - AutoCodes.com — P0697 Code - Sensor Reference Voltage 'C' Circuit Open

What does this mean?

What are the Possible Causes of the DTC P0697?

Faulty Engine Control Module (ECM)
ECM harness is open or shorted
ECM circuit poor electrical connection
Shorted sensor on 5 volt circuit

How to Fix the DTC P0697?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0697 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0697 code?

Need more information on how to fix the P0697 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0697 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P0697 Buick — 5 Volt Reference 3 Circuit
P0697 Cadillac — 5 Volt Reference 3 Circuit
P0697 Chevrolet — 5 Volt Reference 3 Circuit
P0697 Chrysler — 5 Volt Reference 3 Circuit
P0697 Dodge — 5 Volt Reference 3 Circuit
P0697 GMC — 5 Volt Reference 3 Circuit
P0697 Jeep — 5 Volt Reference 3 Circuit
P0697 Subaru — Sensor Reference Voltage 'C' Circuit Open
P0697 Suzuki — Sensor Reference Voltage 'C' Circuit Open

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0697 Code

1. What are the common symptoms of OBDII code P0697?

The common symptoms of OBDII code P0697 include engine stalling, rough idling, poor vehicle performance, and illuminated Check Engine Light.

2. What does OBDII code P0697 indicate?

OBDII code P0697 indicates a problem with the Sensor Reference Voltage 'C' Circuit being open, affecting the proper functioning of sensors in the vehicle.

3. What are the possible causes of OBDII code P0697?

Possible causes of OBDII code P0697 include a faulty sensor, damaged wiring or connectors in the sensor circuit, a blown fuse related to the sensor circuit, or a malfunctioning Engine Control Module (ECM).

4. How can I diagnose OBDII code P0697?

Diagnosing OBDII code P0697 involves using an OBDII scanner to retrieve the code, checking the sensor circuit for continuity, inspecting wiring and connectors for damage, and testing the sensor's voltage output.

5. Can I still drive my vehicle with OBDII code P0697?

It is not recommended to drive your vehicle with OBDII code P0697 as it can lead to further damage and potential safety risks. It is best to address the issue promptly.

6. How can I repair OBDII code P0697?

Repairing OBDII code P0697 involves fixing the underlying issue causing the open circuit, which may include replacing a faulty sensor, repairing damaged wiring or connectors, or addressing ECM malfunctions.

7. Is it possible to reset OBDII code P0697 without repairing the issue?

While you can clear the code temporarily with an OBDII scanner, the Check Engine Light will likely reappear if the root cause of the problem is not addressed. It is best to repair the issue to prevent further issues.

8. How much does it cost to fix OBDII code P0697?

The cost of fixing OBDII code P0697 can vary depending on the specific cause of the issue, the parts needed for repair, and labor costs. It is advisable to consult a professional mechanic for an accurate estimate.

9. Can a DIY enthusiast fix OBDII code P0697?

Depending on the individual's skill level and access to tools, a DIY enthusiast may be able to fix OBDII code P0697 by following diagnostic procedures, checking for common issues, and making necessary repairs. However, professional help is recommended if unsure.

10. How can I prevent OBDII code P0697 from occurring?

Regular vehicle maintenance, checking and replacing sensors as needed, ensuring proper wiring connections, and addressing any electrical issues promptly can help prevent OBDII code P0697 from occurring.