AutoCodes – Mazda – P1271 Mazda

P1271 Mazda Code - Cylinder #1 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: P1271 Mazda indicates Cylinder #1 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 3,192

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 27, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1271 Mazda Description

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

OBDII Code P1271 Mazda - Cylinder #1 High To Low Side Open - AutoCodes.com — P1271 Mazda Code - Cylinder #1 High To Low Side Open

What does this mean?

What are the Possible Causes of the DTC P1271 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 P1271 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 P1271 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 P1271 Mazda code?

Need more information on how to fix the P1271 Mazda code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1271 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 P1271 Mazda Code

1. What are the common symptoms of OBDII code P1271 in a Mazda?

The common symptoms of OBDII code P1271 in a Mazda include rough idling, decreased engine performance, and potential engine misfires.

2. What does the OBDII code P1271 in a Mazda mean?

OBDII code P1271 in a Mazda indicates a high to low side open circuit issue in cylinder #1, which can affect the fuel delivery to that cylinder.

3. What are the possible causes of OBDII code P1271 in a Mazda?

Possible causes of OBDII code P1271 in a Mazda include a faulty fuel injector, wiring issues, poor electrical connections, or a problem with the Engine Control Module (ECM).

4. How can I diagnose the OBDII code P1271 in my Mazda?

Diagnosing OBDII code P1271 in a Mazda involves checking the wiring and connections related to the fuel injector in cylinder #1, testing the fuel injector itself, and inspecting the ECM for any faults.

5. Can I still drive my Mazda with OBDII code P1271?

It is not recommended to drive your Mazda with OBDII code P1271, as it can lead to further engine damage and potential safety hazards due to decreased performance.

6. How can I repair OBDII code P1271 in my Mazda?

Repairing OBDII code P1271 in a Mazda involves addressing the root cause of the issue, which may include replacing a faulty fuel injector, repairing wiring or connections, or reprogramming the ECM.

7. Is it possible to clear the OBDII code P1271 in my Mazda by resetting the engine light?

Resetting the engine light may temporarily clear the OBDII code P1271, but the underlying issue causing the fault code will still need to be diagnosed and repaired to prevent it from reoccurring.

8. Can weather conditions impact the occurrence of OBDII code P1271 in a Mazda?

Extreme weather conditions, such as extreme heat or cold, can sometimes exacerbate existing issues related to OBDII code P1271 in a Mazda, especially if they affect the fuel delivery system.

9. How long does it typically take to repair OBDII code P1271 in a Mazda?

The time it takes to repair OBDII code P1271 in a Mazda can vary depending on the exact cause of the issue, but it may range from a few hours to a full day, depending on the complexity of the repair.

10. Should I seek professional help to repair OBDII code P1271 in my Mazda?

Given the technical nature of diagnosing and repairing OBDII code P1271 in a Mazda, it is recommended to seek professional help from a qualified mechanic or technician to ensure the issue is properly addressed.