P0699 2015 GMC Sierra Code - 5V Reference 3 Circuit High Voltage
Quick Answer
The P0699 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates that the 5V reference 3 circuit is experiencing high voltage. Common causes include Faulty Voltage Regulator: A malfunctioning 5V reference voltage regulator can lead to high voltage on the circuit, Short Circuit: A short circuit in the wiring harness connected to the 5V reference circuit can cause the voltage to spike, Damaged Sensor: A faulty sensor or component that is part of the 5V reference circuit can also trigger the P0699 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
- P0699 2015 GMC Sierra indicates 5V Reference 3 Circuit High Voltage.
- Common causes
- Common causes include Faulty Voltage Regulator: A malfunctioning 5V reference voltage regulator can lead to high voltage on the circuit, Short Circuit: A short circuit in the wiring harness connected to the 5V reference circuit can cause the voltage to spike, Damaged Sensor: A faulty sensor or component that is part of the 5V reference circuit can also trigger the P0699 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 P0699 2015 GMC Sierra Description
The P0699 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates that the 5V reference 3 circuit is experiencing high voltage. The 5V reference circuit is responsible for providing a stable 5-volt power supply to various sensors and components throughout the vehicle. When the voltage on this circuit is higher than normal, it can lead to issues with the operation of these sensors and components.
Common Causes of P0699 2015 GMC Sierra
- Faulty Voltage Regulator: A malfunctioning 5V reference voltage regulator can lead to high voltage on the circuit.
- Short Circuit: A short circuit in the wiring harness connected to the 5V reference circuit can cause the voltage to spike.
- Damaged Sensor: A faulty sensor or component that is part of the 5V reference circuit can also trigger the P0699 code.
- PCM Malfunction: A problem with the powertrain control module (PCM) can disrupt the voltage regulation on the 5V reference circuit.
Symptoms of P0699 2015 GMC Sierra
- Check Engine Light: The most common symptom associated with the P0699 code is the illumination of the check engine light on the vehicle's dashboard.
- Engine Misfires: High voltage on the 5V reference circuit can cause misfires in the engine, leading to rough idling or hesitation during acceleration.
- Poor Fuel Economy: Incorrect sensor readings due to the high voltage condition can result in poor fuel economy as the engine may not be operating efficiently.
- Transmission Issues: The high voltage can also affect the transmission control module, causing erratic shifting or transmission slippage.
How to Fix P0699 2015 GMC Sierra
- Diagnose the Issue: Use a diagnostic scanner to retrieve the trouble codes and perform a thorough inspection of the 5V reference circuit components.
- Check Wiring: Inspect the wiring harness for any signs of damage, corrosion, or short circuits that could be causing the high voltage condition.
- Test Sensors: Test the sensors and components connected to the 5V reference circuit to identify any faulty units that need replacement.
- Replace Voltage Regulator: If the voltage regulator is found to be faulty, replace it with a new unit to ensure proper voltage regulation.
- Clear Codes: After completing the repairs, clear the trouble codes from the vehicle's memory and test drive the vehicle to verify that the issue has been resolved.
Cost to Fix P0699 2015 GMC Sierra
The typical repair costs for addressing a P0699 code on a 2015 GMC Sierra can range from $200 to $500, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's advisable to check local rates for a more precise estimate. Most auto repair shops commonly charge between $80 and $150 per hour, but rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less.
Tech Notes for P0699 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 P0699 2015 GMC Sierra Code
1. What does the OBDII code P0699 mean on a 2015 GMC Sierra?
P0699 indicates a "5V Reference 3 Circuit High Voltage" issue, meaning the voltage in the 5V reference circuit for certain sensors is higher than expected.
2. What are the symptoms of a P0699 code on a 2015 GMC Sierra?
Symptoms may include a check engine light, poor engine performance, erratic sensor readings, or failure of systems relying on the affected 5V reference circuit.
3. What causes the P0699 code to appear?
Common causes include a short to voltage in the 5V reference circuit, a faulty sensor, damaged wiring, or a malfunctioning engine control module (ECM).
4. Which sensors are affected by the 5V Reference 3 Circuit in a 2015 GMC Sierra?
The 5V Reference 3 Circuit typically supplies power to sensors like the throttle position sensor, MAP sensor, or other engine-related sensors. Check your vehicle’s wiring diagram for specifics.
5. Can I drive my 2015 GMC Sierra with a P0699 code?
Driving with a P0699 code is not recommended, as it may result in poor performance or damage to engine components due to incorrect sensor readings.
6. How do I diagnose the P0699 code on my 2015 GMC Sierra?
Start by inspecting the wiring and connectors in the 5V reference circuit, testing the sensors connected to the circuit, and checking for a short to voltage or an open circuit.
7. How do I fix the P0699 code on a 2015 GMC Sierra?
Repairs may include replacing a damaged sensor, repairing or replacing faulty wiring, or in rare cases, replacing the ECM if it’s determined to be defective.
8. Can a faulty sensor cause the P0699 code?
Yes, a faulty sensor drawing excessive voltage or failing internally can cause the 5V reference circuit to report high voltage, triggering the code.
9. How much does it cost to fix a P0699 code on a 2015 GMC Sierra?
Costs vary depending on the root cause. A sensor replacement may cost $50-$200, while wiring repairs or ECM replacement could range from $100 to $1,000.
10. Will clearing the code fix P0699 on my 2015 GMC Sierra?
Clearing the code without addressing the root cause will only temporarily remove the code. The issue must be diagnosed and repaired to prevent it from returning.
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