AutoCodes – Mazda – P1274 Mazda

P1274 Mazda Code - Cylinder #4 High To Low Side Open

Quick Answer

A fault is detected by the fuel injector interface module in the secondary (rearward) fuel injector circuit Common causes include Faulty Fuel Injector, Faulty Fuel Injector Interface Module, Fuel Injector harness is open or shorted. 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: P1274 Mazda indicates Cylinder #4 High To Low Side Open.
Common causes: Common causes include Faulty Fuel Injector, Faulty Fuel Injector Interface Module, Fuel Injector harness is open or shorted.
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 2,503

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 28, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1274 Mazda Description

A fault is detected by the fuel injector interface module in the secondary (rearward) fuel injector circuit

OBDII Code P1274 Mazda - Cylinder #4 High To Low Side Open - AutoCodes.com — P1274 Mazda Code - Cylinder #4 High To Low Side Open

What does this mean?

What are the Possible Causes of the DTC P1274 Mazda?

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

How to Fix the DTC P1274 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 P1274 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 P1274 Mazda code?

Need more information on how to fix the P1274 Mazda code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1274 Mazda 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 P1274 Mazda Code

1. What are the common symptoms of OBDII code P1274 in a Mazda related to Cylinder #4 High To Low Side Open?

- Common symptoms may include rough idle, engine misfires, decreased engine performance, and potential stalling.

2. What can cause the OBDII code P1274 in a Mazda indicating Cylinder #4 High To Low Side Open?

- Possible causes include a faulty fuel injector, wiring issues, poor electrical connection, or a problem with the engine control module.

3. How can I diagnose the OBDII code P1274 in my Mazda pointing to Cylinder #4 High To Low Side Open?

- Diagnosis typically involves inspecting the wiring and connections related to the fuel injector on cylinder #4, checking for any visible damage or loose connections.

4. Is it safe to drive my Mazda with the OBDII code P1274 and Cylinder #4 High To Low Side Open?

- It is not recommended to drive the vehicle with this code present, as it can lead to further engine damage and potential safety hazards.

5. How can I repair the OBDII code P1274 in my Mazda indicating Cylinder #4 High To Low Side Open?

- Repair often involves replacing the faulty fuel injector on cylinder #4, repairing any damaged wiring or connections, and clearing the trouble code.

6. Can a DIY enthusiast fix the OBDII code P1274 related to Cylinder #4 High To Low Side Open in a Mazda?

- While some DIY enthusiasts may be able to tackle this repair, it is recommended to have a professional mechanic diagnose and fix the issue to ensure proper repair and prevent further damage.

7. Are there any preventive measures to avoid the OBDII code P1274 in a Mazda with Cylinder #4 High To Low Side Open?

- Regular maintenance, such as keeping up with fuel injector cleaning and inspection, can help prevent issues that may lead to this trouble code.

8. Will resetting the OBDII code P1274 related to Cylinder #4 High To Low Side Open in my Mazda make it go away permanently?

- Resetting the code may clear it temporarily, but if the underlying issue is not fixed, the code is likely to reappear after some driving cycles.

9. Can other factors besides a faulty fuel injector trigger the OBDII code P1274 in a Mazda for Cylinder #4 High To Low Side Open?

- Yes, wiring problems, poor electrical connections, or issues with the engine control module can also trigger this trouble code.

10. How long does it typically take for a mechanic to repair the OBDII code P1274 in a Mazda due to Cylinder #4 High To Low Side Open?

- The repair time can vary depending on the exact cause of the issue, but it may take a few hours to a full day for a mechanic to diagnose and fix the problem.