AutoCodes – GMC – C1265 GMC

C1265 GMC Code - Left Rear Inlet Valve Solenoid Malfunction

Quick Answer

The system relay is energized when the ignition is ON. Common causes include Faulty Electronic Brake Control Module (EBCM), Electronic Brake Control Module (EBCM) harness is open or shorted, Electronic Brake Control Module (EBCM) 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
C1265 GMC indicates Left Rear Inlet Valve Solenoid Malfunction.
Common causes
Common causes include Faulty Electronic Brake Control Module (EBCM), Electronic Brake Control Module (EBCM) harness is open or shorted, Electronic Brake Control Module (EBCM) 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 1,173
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 31, 2020
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Code C1265 GMC Description

The system relay is energized when the ignition is ON. The system relay supplies voltage to the valve solenoids and the pump motor. This voltage is referred to as the system voltage. The Electronic Brake Control Module (EBCM) microprocessor activates the valve solenoids by grounding the control circuit. The Solenoid Valve circuit is internal to the EBCM. The EBCM sets the OBDII code when the commanded state of the driver and the actual state of the control circuit do not match.
OBDII Code C1265 GMC - Left Rear Inlet Valve Solenoid Malfunction - AutoCodes.com
C1265 GMC Code - Left Rear Inlet Valve Solenoid Malfunction

What are the Possible Causes of the DTC C1265 GMC?

  • Faulty Electronic Brake Control Module (EBCM)
  • Electronic Brake Control Module (EBCM) harness is open or shorted
  • Electronic Brake Control Module (EBCM) circuit poor electrical connection

How to Fix the DTC C1265 GMC?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1265 GMC 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 C1265 GMC code?

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Need Help with the Code?

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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 C1265 GMC Code

1. What are the common symptoms of OBDII code C1265 GMC (Left Rear Inlet Valve Solenoid Malfunction)?

Common symptoms include an illuminated ABS warning light on the dashboard, difficulty stopping the vehicle, and possible loss of traction control.

2. What are the possible causes of OBDII code C1265 GMC?

The code C1265 GMC typically indicates a malfunction in the left rear inlet valve solenoid of the vehicle's antilock brake system (ABS). This could be due to a faulty solenoid, damaged wiring, or a problem with the ABS control module.

3. How can I diagnose the cause of OBDII code C1265 GMC?

Diagnosing the cause of code C1265 GMC requires using a diagnostic scan tool to retrieve the specific ABS trouble codes, inspecting the left rear inlet valve solenoid for damage or corrosion, and checking the wiring connections for any issues.

4. Can I drive my vehicle with OBDII code C1265 GMC active?

It is not recommended to drive your vehicle with an active C1265 GMC code, as it may affect the vehicle's braking performance and traction control system. Get the issue diagnosed and repaired as soon as possible.

5. How can I repair OBDII code C1265 GMC?

Repairing OBDII code C1265 GMC involves replacing the left rear inlet valve solenoid if it is faulty, repairing any damaged wiring, and resetting the ABS system after the repair is completed.

6. Are there any DIY tips for fixing OBDII code C1265 GMC?

While some DIY enthusiasts may attempt to diagnose and repair code C1265 GMC themselves, it is recommended to consult a professional mechanic or technician with experience in ABS systems to ensure the issue is properly resolved.

7. Will resetting the OBDII code C1265 GMC turn off the ABS warning light?

Resetting the OBDII code C1265 GMC may temporarily turn off the ABS warning light, but if the underlying issue is not fixed, the light will likely reappear once the system detects the problem again.

8. How much does it typically cost to repair OBDII code C1265 GMC?

The cost of repairing OBDII code C1265 GMC can vary depending on the extent of the damage, the labor rates of the repair shop, and the cost of any replacement parts needed. It is advisable to get quotes from different mechanics for comparison.

9. Can OBDII code C1265 GMC affect the vehicle's overall safety?

Yes, OBDII code C1265 GMC can impact the vehicle's safety by potentially affecting its braking performance and traction control. It is crucial to address this issue promptly to ensure the safety of the driver and passengers.

10. How can I prevent OBDII code C1265 GMC from occurring in the future?

Regular maintenance of the vehicle's ABS system, including checking for any signs of wear or damage to the solenoids and wiring, can help prevent OBDII code C1265 GMC from occurring in the future.

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