AutoCodes – Hummer – C0890 Hummer

C0890 Hummer 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 Hummer 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,270

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

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

What does this mean?

What are the Possible Causes of the DTC C0890 Hummer?

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 Hummer?

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 Hummer 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 C0890 Hummer code?

Need more information on how to fix the C0890 Hummer code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0890 Hummer 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 C0890 Hummer Code

1. What are the common symptoms of OBDII code C0890 in a Hummer related to the Control Module Voltage Reference Output 3 Circuit?

- Common symptoms include issues with the vehicle's stability control system, ABS system, or traction control system. You may also notice warning lights illuminated on the dashboard.

2. What are the possible causes of OBDII code C0890 in a Hummer?

- The code C0890 in a Hummer could be triggered by a faulty control module, damaged wiring or connectors, or a malfunctioning voltage reference output circuit.

3. How can I diagnose the issue related to OBDII code C0890 in my Hummer?

- To diagnose the problem, it's recommended to use an OBDII scanner to retrieve the specific fault code. Additionally, a thorough inspection of the control module, wiring, and connectors is essential.

4. Is it safe to continue driving my Hummer with OBDII code C0890 present?

- It is not recommended to drive your Hummer with the code C0890 present, as it may affect the vehicle's stability control system, ABS system, or traction control system, compromising safety.

5. How can I repair OBDII code C0890 in my Hummer?

- Repairing OBDII code C0890 typically involves replacing the faulty control module, repairing or replacing damaged wiring or connectors, and resetting the fault code with an OBDII scanner.

6. Can OBDII code C0890 in a Hummer be intermittent?

- Yes, OBDII code C0890 in a Hummer can sometimes be intermittent, especially if the issue is related to a loose connection or intermittent fault in the voltage reference output circuit.

7. Will disconnecting the battery reset OBDII code C0890 in a Hummer?

- Disconnecting the battery may reset the fault code temporarily, but it's important to diagnose and repair the underlying issue causing OBDII code C0890 to prevent it from reoccurring.

8. How much does it cost to fix OBDII code C0890 in a Hummer?

- The cost to fix OBDII code C0890 in a Hummer can vary depending on the specific cause of the issue, the extent of the repair needed, and labor costs at the repair shop. It's best to get a diagnostic and repair estimate from a qualified technician.

9. Can a DIY enthusiast repair OBDII code C0890 in a Hummer?

- While some DIY enthusiasts may have the skills to diagnose and repair OBDII code C0890 in a Hummer, it's recommended to consult a professional technician for complex electrical issues to ensure proper diagnosis and repair.

10. Is it possible for other OBDII codes to be triggered along with C0890 in a Hummer?

- Yes, it is possible for other related codes to be triggered along with C0890, especially if the issue is interconnected with other control modules or circuits in the vehicle's system.