AutoCodes – GMC – P0698 GMC

P0698 GMC 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 GMC 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 3,178

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

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

What does this mean?

What are the Possible Causes of the DTC P0698 GMC?

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 GMC?

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 GMC 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 GMC code?

Need more information on how to fix the P0698 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0698 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

P0698 2014 GMC Sierra — 5V Reference 3 Circuit Low Voltage
P0698 2015 GMC Sierra — 5V Reference 3 Circuit Low Voltage
P0698 2016 GMC Sierra — 5V Reference 3 Circuit Low Voltage
P0698 2017 GMC Sierra — 5V Reference 3 Circuit Low Voltage
P0698 2018 GMC Sierra — 5V Reference 3 Circuit Low Voltage

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 GMC Code

1. What are the common symptoms of OBDII code P0698 GMC (5V Reference 3 Circuit Low Voltage)?

- Common symptoms include engine stalling, rough idling, poor acceleration, and illumination of the Check Engine light.

2. What can cause the OBDII code P0698 GMC to be triggered?

- The code P0698 is typically triggered by a malfunction in the 5V Reference 3 circuit, often caused by wiring issues, a faulty sensor, or a problem with the PCM (Powertrain Control Module).

3. How can I diagnose the OBDII code P0698 GMC?

- Diagnosing the code involves using a scan tool to retrieve the specific fault code, checking the wiring and connectors related to the 5V Reference 3 circuit, and testing the sensor and PCM for proper functioning.

4. What are some repair tips for fixing the OBDII code P0698 GMC?

- Repair tips include inspecting and repairing any damaged wiring or connectors, replacing a faulty sensor if necessary, and reprogramming or replacing the PCM if it is determined to be the cause of the issue.

5. Can I drive my vehicle with the OBDII code P0698 GMC present?

- It is not recommended to drive your vehicle with the code P0698 present, as it can lead to engine performance issues and potentially cause further damage if left unresolved.

6. How much does it typically cost to repair the OBDII code P0698 GMC?

- The cost of repairing the code P0698 can vary depending on the underlying cause. Costs may include labor fees for diagnosis and repairs, as well as the price of any replacement parts needed.

7. Will resetting the Check Engine light clear the OBDII code P0698 GMC?

- Resetting the Check Engine light may temporarily turn it off, but the underlying issue causing the code P0698 will still need to be diagnosed and repaired to prevent the light from coming back on.

8. Is the OBDII code P0698 GMC a common problem in GMC vehicles?

- The code P0698 (5V Reference 3 Circuit Low Voltage) is not as common as some other OBDII codes, but it can still occur in GMC vehicles due to various electrical system issues.

9. Can a DIY enthusiast fix the OBDII code P0698 GMC at home?

- While some DIY enthusiasts may have the skills to diagnose and repair the code P0698, it is recommended to consult a professional mechanic for an accurate diagnosis and proper repair to ensure the issue is resolved correctly.

10. How long does it typically take to repair the OBDII code P0698 GMC?

- The repair time for the code P0698 can vary depending on the exact cause of the issue and the extent of repairs needed. It can range from a quick fix to a more involved repair requiring additional time.