AutoCodes – Generic – C0890

C0890 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 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 5,096

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

What does this mean?

What are the Possible Causes of the DTC C0890?

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?

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 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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Information for Specific Makes

C0890 Buick — Control Module Voltage Reference Output 3 Circuit
C0890 Cadillac — Control Module Voltage Reference Output 3 Circuit
C0890 Chevrolet — Control Module Voltage Reference Output 3 Circuit
C0890 GMC — Control Module Voltage Reference Output 3 Circuit
C0890 Hummer — Control Module Voltage Reference Output 3 Circuit
C0890 Pontiac — Device Voltage Reference Output 3 Circuit Voltage
C0890 Saturn — Device Voltage Reference Output 3 Circuit Voltage

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 Code

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

- Common symptoms may include illuminated check engine light, poor vehicle performance, and issues with electronic control modules.

2. What causes OBDII code C0890 to trigger?

- This code is typically triggered by a malfunction in the control module voltage reference output 3 circuit, which can be caused by wiring issues, damaged connectors, or a faulty control module.

3. How can I diagnose the cause of OBDII code C0890?

- Diagnosing this code usually involves using a multimeter to test the voltage output of the control module, checking for wiring damage or corrosion, and inspecting connectors for any signs of wear or loose connections.

4. Can I continue driving my vehicle with OBDII code C0890?

- It is not recommended to continue driving your vehicle with this code present, as it can lead to further electrical problems and potential engine issues.

5. How can I repair OBDII code C0890?

- Repairing this code may involve repairing or replacing damaged wiring, cleaning or replacing connectors, or replacing the faulty control module causing the issue.

6. Is it safe to reset the code and see if it comes back?

- While you can reset the code to see if it comes back, it is important to address the underlying issue causing the code to prevent potential damage to other components in your vehicle.

7. Can a DIY enthusiast fix OBDII code C0890?

- Depending on your skill level and access to tools, you may be able to address this code yourself by following diagnostic procedures and making necessary repairs to the affected components.

8. Will OBDII code C0890 cause my vehicle to fail an emissions test?

- Yes, since this code indicates a problem with the control module voltage reference output, it can lead to increased emissions and potentially cause your vehicle to fail an emissions test.

9. How long does it typically take to repair OBDII code C0890?

- The repair time can vary depending on the exact cause of the code and the extent of the repairs needed. It may take anywhere from a few hours to a full day to address this issue.

10. Can a faulty battery or alternator cause OBDII code C0890?

- While a faulty battery or alternator can cause electrical issues in a vehicle, OBDII code C0890 specifically relates to a malfunction in the control module voltage reference output 3 circuit. It is recommended to focus on diagnosing and repairing this specific circuit before addressing other potential issues with the battery or alternator.