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P0699 2015 Chevrolet Silverado Code - 5V Reference 3 Circuit High Voltage

Quick Answer

The P0699 diagnostic trouble code (DTC) in a 2015 Chevrolet Silverado indicates that the 5V reference 3 circuit is registering a high voltage. Common causes include Faulty sensor drawing too much voltage, Short circuit in the wiring harness, Malfunctioning ECM. 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 Chevrolet Silverado indicates 5V Reference 3 Circuit High Voltage.
Common causes
Common causes include Faulty sensor drawing too much voltage, Short circuit in the wiring harness, Malfunctioning ECM.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code P0699 2015 Chevrolet Silverado Description

The P0699 diagnostic trouble code (DTC) in a 2015 Chevrolet Silverado indicates that the 5V reference 3 circuit is registering a high voltage. The 5V reference voltage is a crucial signal sent by the engine control module (ECM) to various sensors and components throughout the vehicle. This voltage is used by sensors to provide accurate data to the ECM for proper engine operation and performance. When the 5V reference 3 circuit shows high voltage, it means that the voltage being sent to the sensors is above the specified range, which can lead to incorrect sensor readings and affect the vehicle's overall performance.

OBDII Code P0699 2015 Chevrolet Silverado - 5V Reference 3 Circuit High Voltage
P0699 2015 Chevrolet Silverado Code - 5V Reference 3 Circuit High Voltage

Common Causes of P0699 2015 Chevrolet Silverado

  1. Faulty sensor drawing too much voltage
  2. Short circuit in the wiring harness
  3. Malfunctioning ECM
  4. Problem with the voltage regulator

Symptoms of P0699 2015 Chevrolet Silverado

  1. Poor fuel efficiency
  2. Rough idling or stalling
  3. Engine misfires
  4. Check engine light illuminated
  5. Loss of power

How to Fix P0699 2015 Chevrolet Silverado

  1. Use a scan tool to read the DTC and identify the specific sensor or component causing the high voltage.
  2. Inspect the wiring harness for any signs of damage or short circuits. Repair or replace as necessary.
  3. Test the sensors connected to the 5V reference 3 circuit to determine if any are drawing excessive voltage. Replace faulty sensors.
  4. Check the ECM and voltage regulator for proper functioning. Replace if necessary.
  5. Clear the DTC and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0699 2015 Chevrolet Silverado

The typical repair costs for addressing a P0699 code in a 2015 Chevrolet Silverado can range from $200 to $500, depending on the specific cause of the high voltage and the cost of parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, with rates typically ranging between $80 and $150 per hour. Rates may be higher at dealerships or in metropolitan areas, while independent shops may charge less. It's recommended to obtain quotes from local shops for a more accurate estimate.

What does this mean?

Tech Notes for P0699 2015 Chevrolet Silverado

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

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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 P0699 2015 Chevrolet Silverado Code

1. What does the OBDII code P0699 mean on a 2015 Chevrolet Silverado?

P0699 indicates a "5V Reference 3 Circuit High Voltage," meaning there is an issue with one of the vehicle's 5-volt reference circuits, which provides voltage to various sensors.

2. What are the symptoms of the P0699 code on a 2015 Chevrolet Silverado?

Symptoms can include poor engine performance, erratic sensor readings, difficulty starting, or an illuminated Check Engine Light.

3. What causes the P0699 code to appear?

Common causes include a short to voltage in the 5V reference circuit, a faulty sensor connected to the circuit, a damaged wiring harness, or a malfunctioning Engine Control Module (ECM).

4. How do I diagnose the P0699 code on my Chevrolet Silverado?

Start by inspecting the wiring and connectors related to the 5V reference circuit for damage or corrosion. Use a multimeter to check for proper voltage and continuity in the circuit.

5. Can a faulty sensor trigger the P0699 code?

Yes, a sensor drawing too much voltage or failing internally can cause the 5V reference circuit to register high voltage.

6. Is the P0699 code serious?

Yes, it can affect engine performance and sensor functionality, potentially leading to more significant issues if not addressed promptly.

7. How do I fix the P0699 code on a 2015 Silverado?

Repairs may include replacing a faulty sensor, repairing damaged wiring, or, in rare cases, replacing the ECM if it’s malfunctioning.

8. Can a loose or corroded connector cause a P0699 code?

Yes, a poor connection can lead to erratic voltage readings, triggering the P0699 code.

9. Will clearing the code fix the P0699 issue?

Clearing the code may temporarily turn off the Check Engine Light, but the issue will likely return if the underlying problem isn’t resolved.

10. Can I drive my 2015 Chevrolet Silverado with the P0699 code?

While the vehicle may still be drivable, it's not recommended, as the code can lead to further performance issues or damage other components.

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