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Engine-Codes – Chevrolet – P0699 Chevrolet

P0699 Chevrolet Code - 5V Reference 3 Circuit High Voltage

Quick Answer

The P0699 code for Chevrolet vehicles indicates a problem with the 5V reference 3 circuit, specifically that the voltage is too high. Common causes include Faulty 5V Reference Voltage Regulator: A malfunctioning voltage regulator can cause the voltage in the circuit to be too high, Short Circuit: A short circuit in the wiring harness connected to the 5V reference 3 circuit can lead to increased voltage levels, Malfunctioning Sensor: A faulty sensor connected to the circuit may be sending incorrect signals, causing the voltage to rise. 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 Chevrolet indicates 5V Reference 3 Circuit High Voltage.
Common causes
Common causes include Faulty 5V Reference Voltage Regulator: A malfunctioning voltage regulator can cause the voltage in the circuit to be too high, Short Circuit: A short circuit in the wiring harness connected to the 5V reference 3 circuit can lead to increased voltage levels, Malfunctioning Sensor: A faulty sensor connected to the circuit may be sending incorrect signals, causing the voltage to rise.
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 15, 2024
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Code P0699 Chevrolet Description

The P0699 code for Chevrolet vehicles indicates a problem with the 5V reference 3 circuit, specifically that the voltage is too high. The 5V reference circuit is crucial for providing a stable 5-volt power supply to various sensors and components in the vehicle's engine management system. When the voltage in this circuit is too high, it can lead to erratic sensor readings, incorrect fuel delivery, and overall poor engine performance.

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

Common Causes of P0699 Chevrolet

  1. Faulty 5V Reference Voltage Regulator: A malfunctioning voltage regulator can cause the voltage in the circuit to be too high.
  2. Short Circuit: A short circuit in the wiring harness connected to the 5V reference 3 circuit can lead to increased voltage levels.
  3. Malfunctioning Sensor: A faulty sensor connected to the circuit may be sending incorrect signals, causing the voltage to rise.
  4. Engine Control Module Issue: A problem with the engine control module, such as a software glitch or hardware failure, can also trigger the P0699 code.

Symptoms of P0699 Chevrolet

  1. 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.
  2. Erratic Engine Performance: The vehicle may experience rough idling, stalling, or hesitation during acceleration due to incorrect sensor readings.
  3. Reduced Fuel Efficiency: High voltage in the 5V reference 3 circuit can lead to incorrect fuel delivery, resulting in decreased fuel efficiency.
  4. Electrical Issues: Other electrical components in the vehicle may malfunction or behave erratically due to the high voltage affecting the circuit.

How to Fix P0699 Chevrolet

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the trouble codes and perform a thorough inspection of the 5V reference 3 circuit to identify the root cause of the high voltage.
  2. Check Wiring and Connections: Inspect the wiring harness for any signs of damage, corrosion, or short circuits. Repair or replace any faulty wiring as needed.
  3. Test Sensors: Check the sensors connected to the 5V reference 3 circuit to ensure they are functioning correctly. Replace any malfunctioning sensors.
  4. Replace Voltage Regulator: If the issue lies with the voltage regulator, replace it with a new one to restore the correct voltage levels in the circuit.
  5. Clear Codes and Test Drive: After making the necessary repairs, clear the trouble codes from the engine control module's memory and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0699 Chevrolet

The typical repair costs for addressing a P0699 code on a Chevrolet vehicle can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, replacing a faulty voltage regulator or sensor, repairing wiring harnesses, and conducting diagnostic tests can range from $150 to $500 in parts and labor. However, it's essential to note that the actual costs may vary based on factors such as the location of the repair shop, the vehicle's make and model, and the engine type. Additionally, the diagnosis time and labor rates at auto repair shops can fluctuate, with hourly rates typically falling between $80 and $150. It's recommended to obtain quotes from local repair shops to get a more accurate estimate for addressing the P0699 code on a Chevrolet vehicle.

What does this mean?

Tech Notes for P0699 Chevrolet

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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Information for Specific Chevrolet Models

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 Chevrolet Code

1. What are the common symptoms of OBDII code P0699 in a Chevrolet vehicle?

- Common symptoms include illuminated Check Engine Light (CEL), reduced engine performance, and possible stalling.

2. What does the OBDII code P0699 Chevrolet "5V Reference 3 Circuit High Voltage" mean?

- This code indicates that the powertrain control module (PCM) has detected a higher than normal voltage in the 5V reference circuit 3.

3. What are some possible causes of OBDII code P0699 in a Chevrolet?

- Possible causes include a faulty 5V reference 3 circuit, damaged wiring or connectors, a defective PCM, or issues with sensors connected to the circuit.

4. How can I diagnose the OBDII code P0699 in my Chevrolet?

- Diagnosing this code typically involves using a multimeter to test the voltage in the reference circuit, checking for damaged wiring or connectors, and testing sensors for proper operation.

5. Can I continue driving my Chevrolet with OBDII code P0699 present?

- It is not recommended to drive with this code active, as it can lead to potential engine performance issues or stalling, which may compromise safety.

6. How can I fix OBDII code P0699 in my Chevrolet?

- Repair options may include repairing or replacing damaged wiring, connectors, or sensors in the 5V reference circuit 3, and resetting the PCM to clear the code.

7. Is it possible to reset the OBDII code P0699 in a Chevrolet without fixing the underlying issue?

- While clearing the code may temporarily turn off the CEL, it is important to address the root cause of the problem to prevent potential engine issues in the future.

8. Are there any common mistakes to avoid when dealing with OBDII code P0699 in a Chevrolet?

- Avoid overlooking simple issues like loose connections or ignoring related codes that could provide more insight into the problem.

9. How long does it typically take to repair OBDII code P0699 in a Chevrolet?

- The repair time can vary depending on the exact cause of the issue, but it may take anywhere from an hour for simple fixes to several hours for more complex repairs.

10. Can a DIY enthusiast without advanced automotive knowledge fix OBDII code P0699 in a Chevrolet?

- While some simple repairs like checking and reconnecting wiring may be doable for DIY enthusiasts, diagnosing and fixing complex issues may require professional help.

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