AutoCodes – Chevrolet – P0699 2018 Chevrolet Silverado

P0699 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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 267

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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado - 5V Reference 3 Circuit High Voltage - AutoCodes.com — P0699 2018 Chevrolet Silverado Code - 5V Reference 3 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0699 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado 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.

Need more information about the P0699 2018 Chevrolet Silverado code?

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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 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?

Youâ€™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.