P0698 2014 GMC Sierra Code - 5V Reference 3 Circuit Low Voltage
Quick Answer
The P0698 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a problem with the 5V Reference 3 Circuit, specifically that the voltage is too low. Common causes include Wiring harness issues, Faulty ECM, Short circuit in the 5V Reference 3 Circuit. 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 2014 GMC Sierra indicates 5V Reference 3 Circuit Low Voltage.
- Common causes
- Common causes include Wiring harness issues, Faulty ECM, Short circuit in the 5V Reference 3 Circuit.
- 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 P0698 2014 GMC Sierra Description
The P0698 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a problem with the 5V Reference 3 Circuit, specifically that the voltage is too low. The 5V reference circuit is a crucial component in modern vehicles, as it provides a stable 5-volt reference voltage to various sensors and modules throughout the vehicle. This reference voltage is used by the engine control module (ECM) to monitor and control various engine functions, such as fuel injection, ignition timing, and emissions control.
Common Causes of P0698 2014 GMC Sierra
- Wiring harness issues
- Faulty ECM
- Short circuit in the 5V Reference 3 Circuit
- Malfunctioning sensor or module drawing excessive current
Symptoms of P0698 2014 GMC Sierra
- Rough idling or engine misfires
- Poor fuel economy
- Hesitation during acceleration
- Stalling or difficulty starting the vehicle
How to Fix P0698 2014 GMC Sierra
- Perform a thorough inspection of the wiring harness for any damage or corrosion. Repair or replace any damaged wiring.
- Test the ECM to ensure it is functioning correctly. Replace if necessary.
- Check for a short circuit in the 5V Reference 3 Circuit and repair as needed.
- Test each sensor and module connected to the 5V Reference 3 Circuit to identify any components drawing excessive current. Replace any faulty components.
Cost to Fix P0698 2014 GMC Sierra
The typical repair costs for addressing a P0698 code on a 2014 GMC Sierra can vary depending on the specific cause of the issue. In general, the cost of parts for this repair can range from $100 to $500, with labor costs adding an additional $100 to $300. Overall, the total repair cost may fall between $200 and $800. It's important to note that diagnosis time and labor rates can vary between auto repair shops, so it's advisable to check with local shops for a more accurate estimate based on your location and vehicle specifics.
Tech Notes for P0698 2014 GMC Sierra
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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Frequently Asked Questions about P0698 2014 GMC Sierra Code
1. What does the OBDII code P0698 mean on a 2014 GMC Sierra?
P0698 indicates a "5V Reference 3 Circuit Low Voltage," meaning the vehicle's ECM has detected a low voltage condition in the 5V reference circuit.
2. What are common symptoms of the P0698 code on a 2014 GMC Sierra?
Symptoms may include the check engine light turning on, erratic sensor readings, poor engine performance, or failure of certain systems like the transmission or fuel system to operate correctly.
3. What causes the P0698 code to appear on a GMC Sierra?
Common causes include a damaged or shorted 5V reference circuit, faulty sensors connected to the circuit, a failing ECM, or corroded or loose electrical connections.
4. Which sensors rely on the 5V reference circuit in a 2014 GMC Sierra?
Sensors that commonly use the 5V reference circuit include the throttle position sensor (TPS), manifold absolute pressure (MAP) sensor, and fuel rail pressure sensor.
5. Can a bad ECM cause the P0698 code?
Yes, a malfunctioning ECM can cause the P0698 code if it fails to provide a stable 5V reference signal to the sensors.
6. How do you diagnose the P0698 code on a 2014 GMC Sierra?
Diagnosis involves checking the 5V reference circuit for proper voltage using a multimeter, inspecting the wiring and connectors for damage, and testing the connected sensors for faults.
7. What repairs can fix the P0698 code on a GMC Sierra?
Repairs may include fixing or replacing damaged wiring or connectors, replacing a faulty sensor, or in rare cases, replacing the ECM if it is found to be defective.
8. Can I drive my 2014 GMC Sierra with the P0698 code?
Driving with the P0698 code is not recommended, as it can cause erratic engine performance or damage other systems if the underlying issue is not addressed.
9. How much does it cost to fix the P0698 code on a GMC Sierra?
Repair costs vary, but fixing wiring issues might cost $100-$300, while replacing a sensor or ECM could range from $200 to over $1,000 depending on parts and labor.
10. Can a dead battery or low voltage trigger the P0698 code?
Yes, a weak or dead battery or a charging system issue can sometimes affect the 5V reference circuit and trigger the P0698 code.
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