Engine-Codes.com
Engine-Codes – Cadillac – P0699 Cadillac

P0699 Cadillac Code - 5V Reference 3 Circuit High Voltage

Quick Answer

The P0699 diagnostic trouble code (DTC) for Cadillac vehicles indicates a problem with the 5V reference 3 circuit high voltage. Common causes include Short circuit in the wiring or connectors related to the 5V reference 3 circuit, Damaged or corroded wires in the circuit, Faulty sensor or component drawing excessive voltage. 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 Cadillac indicates 5V Reference 3 Circuit High Voltage.
Common causes
Common causes include Short circuit in the wiring or connectors related to the 5V reference 3 circuit, Damaged or corroded wires in the circuit, Faulty sensor or component drawing excessive voltage.
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 12, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0699 Cadillac Description

The P0699 diagnostic trouble code (DTC) for Cadillac vehicles indicates a problem with the 5V reference 3 circuit high voltage. In simpler terms, this means that there is an issue with the voltage levels in the circuit that provides a 5-volt reference signal to various engine components. This reference voltage is crucial for the proper operation of sensors and other electronic components in the vehicle's engine management system.

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

Common Causes of P0699 Cadillac

  1. Short circuit in the wiring or connectors related to the 5V reference 3 circuit
  2. Damaged or corroded wires in the circuit
  3. Faulty sensor or component drawing excessive voltage
  4. ECM malfunction or internal fault
  5. Water or moisture intrusion in the wiring harness

Symptoms of P0699 Cadillac

  1. Check engine light illuminated on the dashboard
  2. Reduced engine performance or power
  3. Rough idling or engine stalling
  4. Engine misfires or hesitation during acceleration
  5. Issues with other electronic systems in the vehicle

How to Fix P0699 Cadillac

  1. Begin by using a diagnostic scanner to confirm the P0699 code and identify the specific component or wiring issue causing the high voltage.
  2. Inspect the wiring harness and connectors associated with the 5V reference 3 circuit for any visible damage, corrosion, or loose connections.
  3. Test the sensors and components connected to the circuit to determine if any are drawing excessive voltage or causing the issue.
  4. Replace any damaged wires, connectors, or faulty sensors identified during the inspection.
  5. Clear the DTC and reset the ECM to see if the issue is resolved, then perform a road test to ensure the problem has been fixed.

Cost to Fix P0699 Cadillac

The cost of repairing a P0699 code for a Cadillac can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of parts for this repair could range from $50 to $200, depending on the components that need to be replaced. Labor costs at an auto repair shop could range from $100 to $300, depending on the shop's hourly rate and the time required to diagnose and fix the problem. It's advisable to consult with a qualified mechanic or dealership for a more accurate estimate based on your vehicle's make and model.

What does this mean?

Tech Notes for P0699 Cadillac

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

Need more information about the P0699 Cadillac code?

Need more information on how to fix the P0699 Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0699 Cadillac code diagnosed by a professional: Find a repair shop in your area

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 Cadillac Code

1. What does the OBDII code P0699 mean on a Cadillac?

P0699 indicates a problem with the 5V Reference 3 Circuit, specifically that the voltage has exceeded the normal range.

2. What are the common symptoms of the P0699 code?

Symptoms may include the check engine light turning on, erratic or poor engine performance, stalling, or failure of certain sensors like the throttle position sensor.

3. What causes the P0699 code to appear?

Possible 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 powertrain control module (PCM).

4. How can I diagnose the P0699 code on my Cadillac?

Use a scan tool to confirm the code, inspect the wiring and connectors for damage, test the 5V reference circuit for excessive voltage, and check sensors associated with the 5V reference 3 circuit.

5. Which sensors are typically linked to the 5V Reference 3 Circuit?

Sensors commonly linked include the throttle position sensor (TPS), manifold absolute pressure (MAP) sensor, and other engine performance sensors.

6. Can I drive my Cadillac with the P0699 code active?

It’s not recommended to drive with this code active, as it may lead to poor engine performance, stalling, or further damage to the vehicle.

7. How do I fix the P0699 code?

Repairs may involve replacing a damaged sensor, repairing or replacing damaged wiring, cleaning corroded connectors, or, in rare cases, replacing the PCM.

8. How much does it cost to repair the P0699 code?

Repair costs vary depending on the root cause but typically range from $100 to $500 for sensor or wiring repairs. PCM replacement can cost significantly more.

9. Can a bad PCM cause the P0699 code?

Yes, a malfunctioning PCM can fail to regulate the 5V reference circuit properly, leading to high voltage and triggering the code.

10. How can I prevent the P0699 code from recurring?

Regular maintenance, inspecting wiring and connectors for wear, and addressing sensor issues promptly can help prevent this code from recurring.

Discuss the causes and fixes for P0699 Cadillac OBDII Code

Submit a New Comment

Code P0699 Cadillac comments

No comments found for this page.