AutoCodes – Buick – C0890 Buick

C0890 Buick Code - Control Module Voltage Reference Output 3 Circuit

Quick Answer

The brake pedal position sensor is used to sense the action of the driver's application of the brake pedal. Common causes include Faulty Brake Pedal Position Sensor, Brake Pedal Position Sensor harness is open or shorted, Brake Pedal Position Sensor 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: C0890 Buick indicates Control Module Voltage Reference Output 3 Circuit.
Common causes: Common causes include Faulty Brake Pedal Position Sensor, Brake Pedal Position Sensor harness is open or shorted, Brake Pedal Position Sensor 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 1,203

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 05, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code C0890 Buick Description

The brake pedal position sensor is used to sense the action of the driver's application of the brake pedal. The brake pedal position sensor provides an analog voltage signal that will increase as the brake pedal is applied. The Body Control Module (BCM) provides a low reference signal and a 5 V reference voltage to the brake pedal position sensor. When the variable signal reaches a voltage threshold indicating the brakes have been applied, the BCM will apply battery voltage to the left and right stop lamp control circuits as well as the center high-mounted stop lamp relay control circuit illuminating the left and right stop lamps and the center high mounted stop lamp. The Diagnostic Trouble Code (DTC) will be set when the BCM detects an improper voltage in the brake pedal position sensor 5 V reference circuit.

OBDII Code C0890 Buick - Control Module Voltage Reference Output 3 Circuit - AutoCodes.com — C0890 Buick Code - Control Module Voltage Reference Output 3 Circuit

What does this mean?

What are the Possible Causes of the DTC C0890 Buick?

Faulty Brake Pedal Position Sensor
Brake Pedal Position Sensor harness is open or shorted
Brake Pedal Position Sensor circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC C0890 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

C0890:03 Control Module Voltage Reference Output 3 Circuit Low Voltage
C0890:07 Control Module Voltage Reference Output 3 Circuit High Voltage

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C0890 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 C0890 Buick Code

1. What are the common symptoms of OBDII code C0890 Buick?

- The common symptoms include engine stalling, rough idling, poor acceleration, and the illumination of the Check Engine Light.

2. What causes the OBDII code C0890 Buick to trigger?

- The code is triggered when the control module voltage reference output 3 circuit malfunctions due to issues like wiring issues, a faulty control module, or a damaged sensor.

3. How can I diagnose the OBDII code C0890 Buick?

- Diagnosing this code involves using a diagnostic scanner to retrieve the code, inspecting the wiring for any damage, and testing the control module and sensors for proper functioning.

4. What are the possible repair options for OBDII code C0890 Buick?

- Repair options include repairing or replacing damaged wiring, replacing a faulty control module or sensor, and clearing the code with a diagnostic scanner.

5. Can I drive my Buick with the OBDII code C0890 present?

- It is not advisable to drive your Buick with this code present, as it can lead to further damage to the vehicle and potentially unsafe driving conditions.

6. How do I reset the Check Engine Light after repairing OBDII code C0890 Buick?

- You can reset the Check Engine Light by using a diagnostic scanner to clear the code or disconnecting the car's battery for a few minutes.

7. Is OBDII code C0890 Buick a serious issue?

- While the severity of the issue can vary, it is important to address this code promptly to prevent further damage to the vehicle and ensure proper engine performance.

8. Can a DIY enthusiast repair OBDII code C0890 Buick?

- Depending on your skill level and access to tools, some DIY enthusiasts may be able to repair this code by following proper diagnostic and repair procedures.

9. How much does it cost to fix OBDII code C0890 Buick at a repair shop?

- The cost of repairs can vary depending on the extent of the issue, the labor rates of the repair shop, and the cost of any replacement parts needed.

10. How often does OBDII code C0890 Buick occur in Buick vehicles?

- The occurrence of this specific OBDII code can vary, but it is not uncommon in Buick vehicles experiencing issues with the control module voltage reference output 3 circuit.