AutoCodes – Cadillac – P0698 Cadillac

P0698 Cadillac Code - 5V Reference 3 Circuit Low 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: P0698 Cadillac indicates 5V Reference 3 Circuit Low 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 1,605

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 P0698 Cadillac 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 lower than the expected voltage on any of the 5 Volt reference circuits for greater than 0.5 s.

OBDII Code P0698 Cadillac - 5V Reference 3 Circuit Low Voltage - AutoCodes.com — P0698 Cadillac Code - 5V Reference 3 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0698 Cadillac?

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 P0698 Cadillac?

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 P0698 Cadillac 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 P0698 Cadillac Code

1. What are the common symptoms of OBDII code P0698 in a Cadillac related to the 5V Reference 3 Circuit Low Voltage?

The common symptoms include engine misfires, rough idling, poor acceleration, and potential issues with the vehicle's electronic components.

2. What can cause the OBDII code P0698 in a Cadillac indicating 5V Reference 3 Circuit Low Voltage?

Possible causes include a faulty 5V reference circuit, damaged wiring or connectors, a defective sensor or component connected to the circuit, or a problem with the Engine Control Module (ECM).

3. How can I diagnose the OBDII code P0698 in my Cadillac with the 5V Reference 3 Circuit Low Voltage?

Diagnosis typically involves using a multimeter to check the voltage levels on the 5V reference circuit, inspecting the wiring and connectors for any damage, and testing the sensors or components connected to the circuit for proper functionality.

4. Is it safe to continue driving my Cadillac with the OBDII code P0698 indicating 5V Reference 3 Circuit Low Voltage?

It is not recommended to drive the vehicle with this code present as it can lead to further damage to the engine or electronic components. It is best to address the issue promptly.

5. How can I repair the OBDII code P0698 in my Cadillac related to the 5V Reference 3 Circuit Low Voltage?

Repairing the issue may involve repairing or replacing damaged wiring or connectors, replacing any faulty sensors or components, or reprogramming the Engine Control Module (ECM) if necessary.

6. Can a DIY enthusiast fix the OBDII code P0698 indicating 5V Reference 3 Circuit Low Voltage in a Cadillac?

While some simple checks like inspecting wiring and connectors can be done by a DIY enthusiast, diagnosing and repairing this code may require advanced automotive knowledge and tools. It is advisable to seek professional help if needed.

7. Will resetting the fault codes make the OBDII code P0698 go away in a Cadillac?

Resetting the fault codes may temporarily clear the code, but if the underlying issue causing the 5V Reference 3 Circuit Low Voltage is not addressed, the code is likely to reappear after driving the vehicle.

8. How much does it typically cost to repair the OBDII code P0698 in a Cadillac due to the 5V Reference 3 Circuit Low Voltage?

The cost of repair can vary depending on the specific cause of the issue and the labor rates in your area. It's best to consult a mechanic for an accurate estimate.

9. Can extreme weather conditions affect the occurrence of OBDII code P0698 in a Cadillac related to 5V Reference 3 Circuit Low Voltage?

Extreme temperatures or weather conditions can potentially impact electrical components and wiring, which may contribute to the occurrence of this code. It's essential to ensure proper insulation and protection of the electrical system.

10. How often should I have my Cadillac checked for potential issues like the OBDII code P0698 related to 5V Reference 3 Circuit Low Voltage?

Regular maintenance and inspections are recommended to catch any issues early on. If you notice any symptoms or warning lights, it's crucial to have the vehicle checked by a professional promptly.