AutoCodes – Mazda – P1266 Mazda

P1266 Mazda Code - Cylinder #6 High To Low Side Short

Quick Answer

The fuel injectors are connected to the high-pressure fuel rail and deliver a calibrated amount of fuel directly into the combustion chamber. Common causes include Faulty Fuel Injector 6, Fuel Injector 6 harness is open or shorted, Fuel Injector 6 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: P1266 Mazda indicates Cylinder #6 High To Low Side Short.
Common causes: Common causes include Faulty Fuel Injector 6, Fuel Injector 6 harness is open or shorted, Fuel Injector 6 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 2,212

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 02, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1266 Mazda Description

The fuel injectors are connected to the high-pressure fuel rail and deliver a calibrated amount of fuel directly into the combustion chamber. The piezo actuator is commanded on by the PCM during the main injection stage for approximately 0-400 microseconds. The fuel injectors on and off time are controlled by the piezo actuator device which allows extreme precision during the injection cycle. The Diagnostic Trouble Code (DTC) is detected by the Fuel Injector Interface Module in the secondary (rearward) fuel injector circuit.

OBDII Code P1266 Mazda - Cylinder #6 High To Low Side Short - AutoCodes.com — P1266 Mazda Code - Cylinder #6 High To Low Side Short

What does this mean?

What are the Possible Causes of the DTC P1266 Mazda?

Faulty Fuel Injector 6
Fuel Injector 6 harness is open or shorted
Fuel Injector 6 circuit poor electrical connection
Faulty Fuel Injector Interface Module

How to Fix the DTC P1266 Mazda?

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 P1266 Mazda 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 P1266 Mazda code?

Need more information on how to fix the P1266 Mazda code? Get Access to Factory Service Manuals

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 P1266 Mazda Code

1. What does the OBDII code P1266 mean for a Mazda?

P1266 indicates a high-to-low side short in the circuit for cylinder #6, meaning thereâ€™s an electrical issue affecting the fuel injector or ignition system for that cylinder.

2. What are the common symptoms of a P1266 code in a Mazda?

Symptoms include engine misfires, rough idling, reduced fuel efficiency, hesitation during acceleration, and possibly the illumination of the check engine light.

3. What causes the P1266 code to appear on a Mazda?

Common causes include a short in the wiring harness, a faulty fuel injector, a damaged ignition coil, or a problem with the engine control module (ECM).

4. Can a faulty fuel injector cause the P1266 code?

Yes, a malfunctioning fuel injector for cylinder #6 can trigger the P1266 code since it disrupts the electrical circuit.

5. How do you diagnose the P1266 code on a Mazda?

Diagnosis involves inspecting the wiring and connectors for cylinder #6, testing the fuel injector and ignition coil for proper function, and checking the ECM for potential faults.

6. Can I drive my Mazda with the P1266 code?

Driving with this code is not recommended as it can lead to engine misfires, reduced performance, and potential damage to other components, such as the catalytic converter.

7. How can I fix the P1266 code on a Mazda?

Repairs may include replacing damaged wiring, fixing corroded connectors, replacing the cylinder #6 fuel injector, or, in rare cases, replacing the ECM.

8. How much does it cost to repair the P1266 code on a Mazda?

Repair costs vary depending on the issue but typically range from $150 to $500, depending on whether you need to replace the fuel injector, wiring, or other components.

9. Can a P1266 code be caused by a bad ECM?

Yes, although rare, a malfunctioning ECM could fail to control the injector circuit properly, triggering the P1266 code.

10. How can I prevent the P1266 code from occurring in my Mazda?

Regular maintenance, such as inspecting wiring, cleaning connectors, and replacing worn components like injectors or coils, can help prevent this code.