AutoCodes – GMC – P0698 2017 GMC Sierra

P0698 2017 GMC Sierra Code - 5V Reference 3 Circuit Low Voltage

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: P0698 2017 GMC Sierra indicates 5V Reference 3 Circuit Low Voltage.
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.

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Code Popularity 171

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 Jul 17, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0698 2017 GMC Sierra Description

The Engine Control Module (ECM) has four (4) internal 5 Volt reference circuits (Some models have two (2) internal 5 Volt reference circuits). Each internal reference circuit provides external 5 Volt reference circuits for more than one sensor. A short to ground or short to voltage on one external 5 Volt reference circuit can affect all the components connected to the same internal 5 Volt reference circuit. The Diagnostic Trouble Code (DTC) will be set when the ECM detects a lower than the expected voltage on any of the 5 Volt reference circuits for greater than 0.5 s.

OBDII Code P0698 2017 GMC Sierra - 5V Reference 3 Circuit Low Voltage - AutoCodes.com — P0698 2017 GMC Sierra Code - 5V Reference 3 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0698 2017 GMC Sierra?

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 P0698 2017 GMC Sierra?

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 does this mean?

Code Tech Notes

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0698 2017 GMC Sierra 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 P0698 2017 GMC Sierra code?

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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.

Frequently Asked Questions about P0698 2017 GMC Sierra Code

1. What does OBDII code P0698 mean on a 2017 GMC Sierra?

P0698 indicates a low voltage issue in the 5-volt reference 3 circuit, which is used to supply power to certain sensors in the vehicle.

2. What are the common symptoms of the P0698 code?

Common symptoms include a check engine light, erratic sensor readings, poor engine performance, or issues with starting the vehicle.

3. What causes the P0698 code to appear?

Possible causes include a short or open circuit in the 5-volt reference wire, a faulty sensor, a damaged ECM, or corroded or loose electrical connections.

4. Can I drive my 2017 GMC Sierra with a P0698 code?

While the vehicle may still run, driving with this code can lead to performance issues and potential damage to other components. Prompt diagnosis and repair are recommended.

5. How is the P0698 code diagnosed?

A mechanic will inspect the wiring and connectors for damage, use a multimeter to check voltage in the 5-volt reference circuit, and test the sensors and ECM for proper operation.

6. Which sensors are affected by the 5-volt reference 3 circuit in the GMC Sierra?

The exact sensors vary by configuration, but they often include the throttle position sensor, MAP sensor, or other engine management sensors.

7. What repairs can fix the P0698 code?

Repairs may include fixing or replacing damaged wiring, cleaning corroded connectors, replacing a faulty sensor, or in rare cases, replacing the ECM.

8. How much does it cost to repair a P0698 code on a 2017 GMC Sierra?

Costs can range from $100 for minor wiring repairs to $800 or more if the ECM needs replacement, depending on labor rates and parts.

9. What tools are needed to diagnose the P0698 code?

Common tools include an OBDII scanner, a digital multimeter, and basic hand tools for inspecting and repairing wiring and connectors.

10. Does clearing the P0698 code fix the problem?

Clearing the code without addressing the underlying issue will not resolve the problem, and the code will likely return. Proper diagnosis and repair are necessary.