P0698 2015 GMC Sierra Code - 5V Reference 3 Circuit Low Voltage
Quick Answer
The P0698 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates that there is a low voltage condition in the 5V reference 3 circuit. Common causes include Damaged Wiring or Connectors: Corrosion, fraying, or breaks in the wiring or connectors associated with the 5V reference 3 circuit can lead to a low voltage condition, Faulty Sensor or Component: A malfunctioning sensor or component that is drawing excessive current from the 5V reference 3 circuit can cause the voltage to drop, ECM Malfunction: A fault within the engine control module itself can disrupt the 5V reference signal and trigger the P0698 code. 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 2015 GMC Sierra indicates 5V Reference 3 Circuit Low Voltage.
- Common causes
- Common causes include Damaged Wiring or Connectors: Corrosion, fraying, or breaks in the wiring or connectors associated with the 5V reference 3 circuit can lead to a low voltage condition, Faulty Sensor or Component: A malfunctioning sensor or component that is drawing excessive current from the 5V reference 3 circuit can cause the voltage to drop, ECM Malfunction: A fault within the engine control module itself can disrupt the 5V reference signal and trigger the P0698 code.
- 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 2015 GMC Sierra Description
The P0698 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates that there is a low voltage condition in the 5V reference 3 circuit. The 5V reference 3 circuit is responsible for providing a stable 5-volt reference signal to various sensors and components in the vehicle's engine management system. This reference voltage is crucial for the proper operation of these sensors and components, as it allows them to accurately measure and relay data to the engine control module (ECM).
Common Causes of P0698 2015 GMC Sierra
- Damaged Wiring or Connectors: Corrosion, fraying, or breaks in the wiring or connectors associated with the 5V reference 3 circuit can lead to a low voltage condition.
- Faulty Sensor or Component: A malfunctioning sensor or component that is drawing excessive current from the 5V reference 3 circuit can cause the voltage to drop.
- ECM Malfunction: A fault within the engine control module itself can disrupt the 5V reference signal and trigger the P0698 code.
- Short Circuits: Electrical shorts in the circuit can cause voltage drops and trigger the low voltage condition.
Symptoms of P0698 2015 GMC Sierra
- Check Engine Light: The most common symptom associated with the P0698 code is the illumination of the check engine light on the vehicle's dashboard.
- Reduced Engine Performance: The vehicle may experience a loss of power, hesitation, or rough idling due to the low voltage condition affecting engine management.
- Poor Fuel Efficiency: A decrease in fuel efficiency may be observed as the ECM struggles to maintain proper fuel delivery with inaccurate sensor readings.
- Emissions Issues: The vehicle may fail emissions tests or produce higher emissions than normal due to the compromised engine control system.
How to Fix P0698 2015 GMC Sierra
- Diagnose the Issue: Use a diagnostic scanner to retrieve the trouble codes and perform further testing to identify the specific cause of the low voltage condition in the 5V reference 3 circuit.
- Inspect Wiring and Connectors: Check the wiring and connectors associated with the 5V reference 3 circuit for any signs of damage or corrosion. Repair or replace as needed.
- Test Sensors and Components: Test the sensors and components connected to the 5V reference 3 circuit to determine if any are drawing excessive current or causing the voltage drop.
- Check ECM Functionality: Verify the functionality of the engine control module to rule out any internal faults that may be contributing to the issue.
- Clear Codes and Test Drive: Once the repairs have been completed, clear the trouble codes from the ECM and test drive the vehicle to ensure that the issue has been resolved.
Cost to Fix P0698 2015 GMC Sierra
The typical repair costs for addressing a P0698 code in a 2015 GMC Sierra can vary depending on the specific cause of the issue. In general, the cost of parts such as wiring, connectors, sensors, or an ECM can range from $100 to $500 or more. Labor rates at auto repair shops typically range from $80 to $150 per hour, with the total labor cost for diagnosing and repairing this issue likely falling between $200 and $500. It's important to note that these estimates are rough averages, and actual costs may vary based on the location of the repair shop, the make and model of the vehicle, and the extent of the repairs needed. It's advisable to obtain quotes from local auto repair shops for a more accurate cost estimate.
Tech Notes for P0698 2015 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 2015 GMC Sierra Code
1. What does the OBDII code P0698 mean for a 2015 GMC Sierra?
P0698 indicates a low voltage issue in the 5-volt reference circuit 3, which supplies power to various sensors.
2. What are the common symptoms of code P0698 in a 2015 GMC Sierra?
Symptoms may include the check engine light, poor engine performance, difficulty starting, or erratic sensor readings.
3. What causes the P0698 code to appear?
Common causes include a short or open in the 5-volt reference circuit, a faulty sensor, damaged wiring, or a malfunctioning engine control module (ECM).
4. How is the P0698 code diagnosed?
A mechanic will check the wiring and connectors in the 5-volt reference circuit, test related sensors, and use a multimeter to measure voltage levels.
5. Can a faulty sensor trigger the P0698 code?
Yes, a defective sensor drawing excessive current or causing a short can lead to this code.
6. Is the P0698 code safe to drive with?
Driving with this code is not recommended as it can result in poor engine performance and may cause further damage.
7. How do you fix the P0698 code on a 2015 GMC Sierra?
Repairs may involve fixing or replacing damaged wiring, cleaning corroded connectors, replacing a faulty sensor, or reprogramming/updating the ECM.
8. Which sensors are linked to the 5-volt reference circuit 3 in a 2015 GMC Sierra?
Specific sensors vary, but they often include the throttle position sensor (TPS), manifold absolute pressure (MAP) sensor, or other engine management sensors.
9. Can a bad ECM cause the P0698 code?
Yes, a malfunctioning ECM can fail to supply the proper 5-volt reference signal, triggering this code.
10. How much does it typically cost to fix the P0698 code?
Repair costs can range from $100 to $500 or more, depending on whether the issue is with wiring, sensors, or the ECM.
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