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Engine-Codes – GMC – C0890 GMC

C0890 GMC Code - Control Module Voltage Reference Output 3 Circuit

Quick Answer

The C0890 GMC code indicates a problem with the Control Module Voltage Reference Output 3 Circuit in the vehicle. Common causes include Damaged wiring or connectors in the voltage reference output circuit, Faulty control module, Malfunctioning voltage regulator. 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 GMC indicates Control Module Voltage Reference Output 3 Circuit.
Common causes
Common causes include Damaged wiring or connectors in the voltage reference output circuit, Faulty control module, Malfunctioning voltage regulator.
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 09, 2024
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Code C0890 GMC Description

The C0890 GMC code indicates a problem with the Control Module Voltage Reference Output 3 Circuit in the vehicle. The control module in a vehicle is responsible for managing and coordinating various systems and functions, ensuring they operate efficiently and effectively. The voltage reference output circuit is a crucial component that provides a stable voltage level for the control module to function correctly. When this circuit malfunctions, it can have a significant impact on the vehicle's performance and overall operation.

OBDII Code C0890 GMC - Control Module Voltage Reference Output 3 Circuit
C0890 GMC Code - Control Module Voltage Reference Output 3 Circuit

Common Causes of C0890 GMC

  1. Damaged wiring or connectors in the voltage reference output circuit
  2. Faulty control module
  3. Malfunctioning voltage regulator
  4. Issues with the battery or alternator
  5. Corrosion or contamination in the circuit

Symptoms of C0890 GMC

  1. Engine misfires or hesitation
  2. Illuminated check engine light
  3. Rough idling or stalling
  4. Loss of power or acceleration
  5. Poor fuel economy

How to Fix C0890 GMC

  1. Begin by conducting a thorough inspection of the voltage reference output circuit, checking for any visible damage to wiring or connectors.
  2. Test the control module and voltage regulator to determine if they are functioning correctly. Replace any components that are faulty.
  3. Inspect the battery and alternator for proper operation and voltage output. Address any issues found.
  4. Clear the diagnostic trouble codes and reset the control module to see if the issue persists.
  5. Perform a road test to ensure the problem has been resolved and that the vehicle is operating smoothly.

Cost to Fix C0890 GMC

The typical repair costs for addressing the C0890 GMC code can range from $200 to $500, depending on the specific cause of the issue and the cost of parts and labor. However, it's essential to note that the actual cost can vary significantly based on factors such as the location of the repair shop, the make and model of the vehicle, and the type of engine. Diagnostic time and labor rates at auto repair shops can also influence the final cost. It's advisable to consult with a qualified mechanic or repair shop to get an accurate estimate for this repair.

What does this mean?

Tech Notes for C0890 GMC

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

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

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Information for Specific GMC Models

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 GMC Code

1. What are the common symptoms of OBDII code C0890 in a GMC vehicle?

The common symptoms of OBDII code C0890 in a GMC vehicle may include issues with engine performance, illuminated Check Engine Light, and potential drivability issues.

2. What does OBDII code C0890 indicate about the Control Module Voltage Reference Output 3 Circuit in a GMC vehicle?

OBDII code C0890 indicates a fault or malfunction in the Control Module Voltage Reference Output 3 Circuit in a GMC vehicle.

3. What are the possible causes of OBDII code C0890 in a GMC vehicle?

Possible causes of OBDII code C0890 in a GMC vehicle include a faulty control module, wiring issues, poor electrical connections, or a malfunctioning voltage reference circuit.

4. How can I diagnose OBDII code C0890 in my GMC vehicle?

Diagnosing OBDII code C0890 in a GMC vehicle typically involves using a diagnostic scanner to retrieve the code, inspecting the wiring and connectors related to the Control Module Voltage Reference Output 3 Circuit, and testing the voltage reference circuit for proper operation.

5. Is it safe to continue driving with OBDII code C0890 in my GMC vehicle?

It is generally not recommended to continue driving with OBDII code C0890 present in a GMC vehicle, as it can lead to further issues with engine performance and potentially cause damage to other components.

6. Can I repair OBDII code C0890 in my GMC vehicle myself?

Repairing OBDII code C0890 in a GMC vehicle may require technical expertise and knowledge of automotive electrical systems. It is recommended to consult a professional mechanic for proper diagnosis and repair.

7. How much does it typically cost to repair OBDII code C0890 in a GMC vehicle?

The cost of repairing OBDII code C0890 in a GMC vehicle can vary depending on the underlying cause of the issue, the extent of the repairs needed, and labor costs. It is advisable to obtain quotes from different repair shops for an accurate estimate.

8. Are there any preventative maintenance tips to avoid OBDII code C0890 in a GMC vehicle?

To help prevent OBDII code C0890 in a GMC vehicle, regular maintenance checks, timely inspections of the electrical system, and addressing any warning signs promptly can help maintain the health of the control module and related circuits.

9. Can OBDII code C0890 cause other problems in a GMC vehicle if left untreated?

If left untreated, OBDII code C0890 in a GMC vehicle can potentially lead to issues with other electronic control systems, engine performance, and overall drivability. It is important to address the underlying cause promptly.

10. How long does it typically take to repair OBDII code C0890 in a GMC vehicle?

The repair time for OBDII code C0890 in a GMC vehicle can vary depending on the exact cause of the issue, availability of parts, and the expertise of the mechanic. It is advisable to consult with a professional for a more accurate time estimate.

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