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Engine-Codes – GMC – P0697 2017 GMC Sierra

P0697 2017 GMC Sierra Code - 5 Volt Reference 3 Circuit

Quick Answer

The P0697 code for a 2017 GMC Sierra refers to a 5 Volt Reference 3 Circuit issue. Common causes include Damaged wiring or connectors in the 5-volt reference 3 circuit, Faulty fuel tank pressure sensor, Malfunctioning fuel rail pressure sensor. 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 2017 GMC Sierra indicates 5 Volt Reference 3 Circuit.
Common causes
Common causes include Damaged wiring or connectors in the 5-volt reference 3 circuit, Faulty fuel tank pressure sensor, Malfunctioning fuel rail pressure sensor.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code P0697 2017 GMC Sierra Description

The P0697 code for a 2017 GMC Sierra refers to a 5 Volt Reference 3 Circuit issue. In modern vehicles, the Engine Control Module (ECM) or Powertrain Control Module (PCM) sends out 5-volt reference signals to various sensors throughout the vehicle. These sensors use the 5-volt reference signal to provide important data to the ECM/PCM for proper engine operation and overall vehicle performance. The 5-volt reference 3 circuit specifically supplies voltage to certain sensors like the fuel tank pressure sensor, the fuel rail pressure sensor, and the accelerator pedal position sensor.

OBDII Code P0697 2017 GMC Sierra - 5 Volt Reference 3 Circuit
P0697 2017 GMC Sierra Code - 5 Volt Reference 3 Circuit

Common Causes of P0697 2017 GMC Sierra

  1. Damaged wiring or connectors in the 5-volt reference 3 circuit.
  2. Faulty fuel tank pressure sensor.
  3. Malfunctioning fuel rail pressure sensor.
  4. Defective accelerator pedal position sensor.
  5. ECM/PCM software issue.

Symptoms of P0697 2017 GMC Sierra

  1. Check Engine Light illuminated on the dashboard.
  2. Engine running rough or misfiring.
  3. Reduced engine power or acceleration.
  4. Vehicle stalling or difficulty starting.
  5. Poor fuel economy.

How to Fix P0697 2017 GMC Sierra

  1. Begin by using a diagnostic scanner to confirm the P0697 code and identify the specific sensor causing the issue.
  2. Inspect the wiring and connectors associated with the 5-volt reference 3 circuit for any signs of damage or corrosion. Repair or replace as needed.
  3. Test the fuel tank pressure sensor, fuel rail pressure sensor, and accelerator pedal position sensor for proper operation. Replace any faulty sensors.
  4. Clear the code from the ECM/PCM memory and test drive the vehicle to ensure the issue has been resolved.
  5. If the code persists, further diagnostic testing may be required to pinpoint the exact cause of the 5-volt reference 3 circuit problem.

Cost to Fix P0697 2017 GMC Sierra

The typical repair costs for addressing a P0697 code on a 2017 GMC Sierra can vary depending on the specific cause of the issue. In general, the cost of parts such as sensors and wiring components can range from $100 to $300. Labor costs at auto repair shops typically range from $80 to $150 per hour. The total cost of repairs for this code could range from $200 to $500, but it's advisable to check with local auto repair shops for more accurate estimates based on your location and vehicle specifics.

What does this mean?

Tech Notes for P0697 2017 GMC Sierra

Disconnecting one component at a time from the affected 5 Volt reference circuit while observing the scan tool 5 Volt Reference Circuit Status parameter may help locate the fault. The scan tool parameter will change from Malfunction to OK when the source of the fault is disconnected. If all 5 Volt reference components have been disconnected and a fault is still indicated, the fault may exist in the wiring harness.



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

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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.

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