AutoCodes – Buick – P0699 Buick

P0699 Buick Code - 5V Reference 3 Circuit High Voltage

Quick Answer

The Engine Control Module (ECM) has four (4) internal 5 Volt reference circuits (Some models have two (2) internal 5 Volt reference circuits). Common causes include Faulty Sensor on 5 Volt circuit, Sensor on 5 Volt circuit harness is open or shorted, Sensor on 5 Volt circuit poor electrical connection. 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 Buick indicates 5V Reference 3 Circuit High Voltage.
Common causes: Common causes include Faulty Sensor on 5 Volt circuit, Sensor on 5 Volt circuit harness is open or shorted, Sensor on 5 Volt circuit poor electrical connection.
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 Popularity 693

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 17, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0699 Buick Description

The Engine Control Module (ECM) has four (4) internal 5 Volt reference circuits (Some models have two (2) internal 5 Volt reference circuits). Each internal reference circuit provides external 5 Volt reference circuits for more than one sensor. A short to ground or short to voltage on one external 5 Volt reference circuit can affect all the components connected to the same internal 5 Volt reference circuit. The Diagnostic Trouble Code (DTC) will be set when the ECM detects a higher than the expected voltage on any of the 5 Volt reference circuits for greater than 0.5 s.

OBDII Code P0699 Buick - 5V Reference 3 Circuit High Voltage - AutoCodes.com — P0699 Buick Code - 5V Reference 3 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0699 Buick?

Faulty Sensor on 5 Volt circuit
Sensor on 5 Volt circuit harness is open or shorted
Sensor on 5 Volt circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0699 Buick?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0699 Buick code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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 Buick Code

1. What are the common symptoms of OBDII code P0699 in a Buick related to the 5V Reference 3 Circuit High Voltage issue?

The common symptoms include the illumination of the Check Engine Light on the dashboard, potential loss of engine power, and possible issues with the vehicle's electrical systems.

2. What are the typical causes of the P0699 code in a Buick indicating high voltage in the 5V Reference 3 Circuit?

The main causes can include a faulty 5V reference circuit, damaged wiring or connectors in the circuit, a defective Engine Control Module (ECM), or a malfunctioning sensor connected to the circuit.

3. How can I diagnose the P0699 code in my Buick related to the 5V Reference 3 Circuit High Voltage problem?

Diagnosis typically involves using an OBDII scanner to retrieve the specific code, inspecting the 5V reference circuit for any visible damage, testing the voltage levels within the circuit, and checking for any loose or corroded connections.

4. Is it safe to continue driving my Buick with the P0699 code indicating high voltage in the 5V Reference 3 Circuit?

It is generally not recommended to drive the vehicle with this code present, as it can lead to further electrical issues and potential damage to the vehicle's components. It is advisable to address the problem promptly.

5. What are some tips for repairing the P0699 code in a Buick related to the 5V Reference 3 Circuit High Voltage issue?

Repair tips may include repairing or replacing any damaged wiring or connectors in the 5V reference circuit, testing and, if necessary, replacing the affected sensor, or reprogramming the ECM if deemed necessary by a professional technician.

6. Can a DIY enthusiast fix the P0699 code in a Buick indicating high voltage in the 5V Reference 3 Circuit?

While some basic diagnostics can be done by a DIY enthusiast, addressing the root cause of the issue often requires advanced electrical knowledge and specialized tools. It is recommended to consult a qualified mechanic for proper diagnosis and repair.

7. How much should I expect to pay to repair the P0699 code in my Buick related to the 5V Reference 3 Circuit High Voltage problem?

The cost of repair can vary depending on the exact cause of the issue, labor rates in your area, and the parts needed for the repair. It is advisable to obtain quotes from different mechanics to compare prices.

8. Will resetting the OBDII code P0699 in my Buick related to the 5V Reference 3 Circuit High Voltage problem make it go away permanently?

Resetting the code may temporarily turn off the Check Engine Light, but if the underlying issue causing the high voltage in the 5V Reference 3 Circuit is not addressed, the code is likely to reappear. It is important to diagnose and fix the root cause of the problem.

9. How long does it typically take to repair the P0699 code in a Buick indicating high voltage in the 5V Reference 3 Circuit?

The repair time can vary depending on the complexity of the issue and the availability of parts. In some cases, it may be a relatively quick fix, while in others, it could take several hours or more to diagnose and repair the problem.

10. Can the P0699 OBDII code in a Buick related to the 5V Reference 3 Circuit High Voltage issue cause any long-term damage to the vehicle if left unresolved?

Continuing to drive the vehicle with this code present can potentially cause damage to other electrical components or systems in the vehicle over time. It is best to address the issue promptly to prevent any further damage.