P0697 Buick Code - 5 Volt Reference 3 Circuit
Quick Answer
The Engine Control Module (ECM) has four (4) internal 5 Volt reference circuits (Some models have two (2) internal 5 Volt reference circuits). Common causes include Faulty Sensor on 5 Volt circuit, Sensor on 5 Volt circuit harness is open or shorted, Sensor on 5 Volt 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 Buick indicates 5 Volt Reference 3 Circuit.
- Common causes
- Common causes include Faulty Sensor on 5 Volt circuit, Sensor on 5 Volt circuit harness is open or shorted, Sensor on 5 Volt 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.
Code P0697 Buick Description
What are the Possible Causes of the DTC P0697 Buick?
- Faulty Sensor on 5 Volt circuit
- Sensor on 5 Volt circuit harness is open or shorted
- Sensor on 5 Volt circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0697 Buick?
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.
Code Tech Notes
The 5 Volt reference 3 circuit provides 5 Volt to the following sensors: (Some models may have different sensors, please consult the factory service manual for the list of sensors for your model and year)
- Accelerator pedal position sensor 2
- Manifold absolute pressure sensor
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0697 Buick 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.
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Frequently Asked Questions about P0697 Buick Code
1. What does the OBDII code P0697 mean on a Buick?
The P0697 code indicates a fault in the 5-volt reference 3 circuit, which supplies voltage to certain sensors in the vehicle.
2. What are the common symptoms of the P0697 code in a Buick?
Symptoms may include the check engine light turning on, poor engine performance, erratic sensor readings, or issues with fuel efficiency.
3. What causes the P0697 code to appear on a Buick?
Common causes include a damaged or shorted 5-volt reference wire, a faulty sensor, corrosion in electrical connectors, or a malfunctioning engine control module (ECM).
4. Which sensors rely on the 5-volt reference 3 circuit in a Buick?
The affected sensors vary by model but may include throttle position sensors, MAP sensors, or other engine-related sensors.
5. Can I drive my Buick with the P0697 code active?
Driving with this code is not recommended as it can cause performance issues and may damage other components over time.
6. How do I diagnose the P0697 code on my Buick?
Start by inspecting the 5-volt reference wiring and connectors for damage or corrosion, then test the sensors and ECM for proper operation.
7. What tools are needed to fix the P0697 code on a Buick?
You may need a multimeter to check voltage, an OBDII scanner to clear the code, and basic tools to inspect or replace wiring and sensors.
8. How much does it cost to repair the P0697 code on a Buick?
Repair costs vary but can range from $100 to $500 depending on whether it’s a simple wiring repair or requires replacing a sensor or ECM.
9. Can a faulty ECM cause the P0697 code on a Buick?
Yes, a malfunctioning ECM can fail to send the proper 5-volt reference signal, triggering the P0697 code.
10. How do I prevent the P0697 code from recurring in my Buick?
Regularly inspect and maintain the wiring, connectors, and sensors in your vehicle to prevent future issues with the 5-volt reference circuit.
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