AutoCodes – Chevrolet – C1266 Chevrolet

C1266 Chevrolet Code - Left Rear Outlet 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: C1266 Chevrolet indicates Left Rear Outlet 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 1,581

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 Aug 31, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1266 Chevrolet 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 C1266 Chevrolet - Left Rear Outlet Valve Solenoid Malfunction - AutoCodes.com — C1266 Chevrolet Code - Left Rear Outlet Valve Solenoid Malfunction

What does this mean?

What are the Possible Causes of the DTC C1266 Chevrolet?

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 C1266 Chevrolet?

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 C1266 Chevrolet 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 C1266 Chevrolet Code

What does OBDII code C1266 mean for a Chevrolet vehicle?

OBDII code C1266 indicates a malfunction in the left rear outlet valve solenoid, which is part of the vehicle's braking system, specifically relating to the anti-lock braking system (ABS).

What are the common symptoms of a C1266 code?

Common symptoms include the ABS warning light illuminating on the dashboard, a decrease in braking performance, and potential unusual noises from the braking system.

What could cause the C1266 code to trigger?

Possible causes include a faulty left rear outlet valve solenoid, wiring issues or short circuits in the solenoid circuit, or problems with the ABS control module.

How can I diagnose the C1266 code?

To diagnose the C1266 code, you can use an OBDII scanner to confirm the code, inspect the left rear outlet valve solenoid and its wiring for damage, and check for any additional codes that might provide more context.

What repairs might be needed for a C1266 code?

Repairs may include replacing the left rear outlet valve solenoid, repairing or replacing damaged wiring, or in some cases, replacing the ABS control module if it is found to be faulty.

Can I drive my Chevrolet if I have a C1266 code?

While you can drive the vehicle, it is not recommended as the braking performance may be compromised, which could pose a safety risk.

How much does it typically cost to fix a C1266 code?

Repair costs can vary widely, but replacing a solenoid may range from $100 to $300, depending on labor rates and parts. Additional costs may arise if further electrical issues are identified.

Will clearing the C1266 code fix the problem?

Clearing the code will not fix the underlying issue. The code may return if the malfunctioning component or wiring is not addressed.

Is it safe to ignore the C1266 code?

Ignoring the C1266 code is not safe, as it can affect your vehicle's braking system and overall safety. It is advisable to have it diagnosed and repaired promptly.