P0699 2018 Chevrolet Silverado Code - 5V Reference 3 Circuit High Voltage
Quick Answer
The P0699 code on a 2018 Chevrolet Silverado refers to a "5V Reference 3 Circuit High Voltage" issue. Common causes include Damaged Wiring: Corrosion, fraying, or breaks in the wiring harness connected to the 5V reference circuit can cause high voltage conditions, Faulty Sensor: A malfunctioning sensor that is drawing too much voltage from the 5V reference circuit can trigger the P0699 code, ECM Malfunction: An issue with the engine control module (ECM) that regulates the 5-volt reference circuit can lead to high voltage conditions. 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 2018 Chevrolet Silverado indicates 5V Reference 3 Circuit High Voltage.
- Common causes
- Common causes include Damaged Wiring: Corrosion, fraying, or breaks in the wiring harness connected to the 5V reference circuit can cause high voltage conditions, Faulty Sensor: A malfunctioning sensor that is drawing too much voltage from the 5V reference circuit can trigger the P0699 code, ECM Malfunction: An issue with the engine control module (ECM) that regulates the 5-volt reference circuit can lead to high voltage conditions.
- 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 2018 Chevrolet Silverado Description
The P0699 code on a 2018 Chevrolet Silverado refers to a "5V Reference 3 Circuit High Voltage" issue. This code indicates that there is a high voltage condition in the 5-volt reference circuit for sensor 3. In modern vehicles, numerous sensors rely on a 5-volt reference voltage from the engine control module (ECM) to function properly. When the voltage in this circuit exceeds the specified limit, it triggers the P0699 code.
Common Causes of P0699 2018 Chevrolet Silverado
- Damaged Wiring: Corrosion, fraying, or breaks in the wiring harness connected to the 5V reference circuit can cause high voltage conditions.
- Faulty Sensor: A malfunctioning sensor that is drawing too much voltage from the 5V reference circuit can trigger the P0699 code.
- ECM Malfunction: An issue with the engine control module (ECM) that regulates the 5-volt reference circuit can lead to high voltage conditions.
- Poor Ground Connection: A weak or faulty ground connection in the circuit can result in voltage spikes triggering the code.
- Water Intrusion: Water or moisture entering the wiring harness or connectors can cause electrical issues, including high voltage conditions.
Symptoms of P0699 2018 Chevrolet Silverado
- 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.
- Erratic Engine Performance: The vehicle may experience rough idling, hesitation, or a lack of power under acceleration due to the high voltage condition affecting sensor operation.
- Poor Fuel Efficiency: A malfunction in the 5V reference circuit can lead to inaccurate sensor readings, resulting in decreased fuel efficiency.
- Transmission Issues: The vehicle may exhibit transmission shifting problems or erratic behavior as a result of the high voltage condition affecting sensor inputs.
- Stalling: In severe cases, the engine may stall unexpectedly, especially during idling or low-speed driving, due to the disrupted sensor signals.
How to Fix P0699 2018 Chevrolet Silverado
- Diagnostic Scan: Use an OBD-II scanner to retrieve the P0699 code and any related codes, then perform a comprehensive inspection of the 5V reference circuit components.
- Visual Inspection: Inspect the wiring harness, connectors, and sensors connected to the 5-volt reference circuit for any signs of damage, corrosion, or loose connections.
- Test Sensors: Test the sensors that rely on the 5-volt reference voltage to determine if any are drawing excessive voltage or malfunctioning.
- Repair or Replace Components: Repair any damaged wiring, connectors, or sensors in the 5-volt reference circuit, and replace any faulty components as needed.
- Clear Codes: After completing the repairs, clear the diagnostic trouble codes from the vehicle's ECM using the OBD-II scanner to reset the check engine light.
Cost to Fix P0699 2018 Chevrolet Silverado
The typical repair costs for addressing a P0699 code on a 2018 Chevrolet Silverado can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the repair costs for this type of problem may range from $150 to $500, including parts and labor. However, it's important to note that the actual costs can be higher if extensive diagnostics are required or if multiple components need to be replaced.
Tech Notes for P0699 2018 Chevrolet Silverado
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 2018 Chevrolet Silverado Code
1. What does the OBDII code P0699 mean for a 2018 Chevrolet Silverado?
P0699 indicates a high voltage issue in the 5V Reference 3 circuit, which is used to provide a stable 5-volt supply to certain engine sensors.
2. What are the common symptoms of code P0699 in a 2018 Chevrolet Silverado?
Symptoms may include the check engine light turning on, poor engine performance, erratic sensor readings, and possible stalling or hesitation during acceleration.
3. What causes the P0699 code to trigger in a 2018 Chevrolet Silverado?
Possible causes include a short to voltage in the 5V reference circuit, a faulty sensor connected to the circuit, damaged wiring, or a malfunctioning powertrain control module (PCM).
4. Can a faulty sensor trigger the P0699 code?
Yes, a faulty sensor connected to the 5V Reference 3 circuit can cause this code by disrupting the consistent 5-volt signal.
5. How do I diagnose the P0699 code in my 2018 Chevrolet Silverado?
Use a multimeter to check for proper voltage in the 5V Reference 3 circuit, inspect wiring and connectors for damage, and test the sensors connected to the circuit for faults.
6. Is it safe to drive with the P0699 code active?
Driving with this code is not recommended, as it can lead to erratic engine behavior and potentially cause further damage to the vehicle.
7. How can I fix the P0699 code on my 2018 Chevrolet Silverado?
Repairs may include fixing damaged wiring or connectors, replacing a faulty sensor, or in rare cases, replacing the PCM if it is determined to be defective.
8. Which sensors use the 5V Reference 3 circuit in a 2018 Chevrolet Silverado?
The 5V Reference 3 circuit could supply voltage to sensors like the throttle position sensor (TPS), manifold absolute pressure (MAP) sensor, or other engine management components.
9. What tools are needed to troubleshoot the P0699 code?
You’ll need an OBDII scanner, a multimeter for voltage testing, and possibly a wiring diagram for the 5V Reference 3 circuit to pinpoint the issue.
10. Can a blown fuse cause the P0699 code in a 2018 Chevrolet Silverado?
While unlikely, a blown fuse related to the 5V reference circuit could disrupt voltage supply and cause this code. Check the fuse box to rule this out.
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