AutoCodes – Ford – P1275 Ford

P1275 Ford Code - Cylinder #5 High To Low Side Open

Quick Answer

The Injector Driver Module (IDM) is capable of detecting individual injectors open and shorts to either ground or power while the engine is running. Common causes include Faulty Fuel Injector, Faulty Injector Driver Module (IDM), 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: P1275 Ford indicates Cylinder #5 High To Low Side Open.
Common causes: Common causes include Faulty Fuel Injector, Faulty Injector Driver Module (IDM), 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 13,412

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 03, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1275 Ford Description

The Injector Driver Module (IDM) is capable of detecting individual injectors open and shorts to either ground or power while the engine is running. The Injector Driver Module is also capable of detecting right or left bank high side circuit opens or shorts to ground. The Diagnostic Trouble Code (DTC) indicates a low side-to-high side open in the circuit between the Injector Driver Module and the injector.

OBDII Code P1275 Ford - Cylinder #5 High To Low Side Open - AutoCodes.com — P1275 Ford Code - Cylinder #5 High To Low Side Open

What does this mean?

What are the Possible Causes of the DTC P1275 Ford?

Faulty Fuel Injector
Faulty Injector Driver Module (IDM)
Fuel Injector harness is open or shorted
Fuel Injector circuit poor electrical connection

How to Fix the DTC P1275 Ford?

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 does this mean?

Code Tech Notes

Check valve cover wire harness connections first, including under the valve cover.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1275 Ford 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 P1275 Ford Code

1. What does the OBDII code P1275 mean on a Ford?

P1275 indicates a high-to-low side open circuit issue in cylinder #5, typically involving the injector circuit.

2. What are the common symptoms of the P1275 code on a Ford?

Symptoms may include rough idling, engine misfires, reduced power, poor fuel efficiency, or a check engine light.

3. What causes the P1275 code on a Ford vehicle?

Common causes include a faulty fuel injector, damaged wiring or connectors in the injector circuit, or a failed powertrain control module (PCM).

4. How can I diagnose the P1275 code on a Ford?

Use a multimeter to check for continuity in the wiring and connectors for cylinder #5's injector, inspect for visible damage, and test the injector itself for proper operation.

5. Can a bad fuel injector cause the P1275 code on a Ford?

Yes, a malfunctioning fuel injector can cause an open circuit and trigger the P1275 code.

6. Is it safe to drive with the P1275 code on a Ford?

Driving with this code may lead to further engine damage or decreased performance, so it’s best to address the issue promptly.

7. How do I fix the P1275 code on a Ford?

Repairs may involve replacing or repairing the injector, fixing damaged wiring or connectors, or reprogramming/replacing the PCM if necessary.

8. How much does it cost to fix the P1275 code on a Ford?

Costs vary depending on the specific issue but can range from $100 for wiring repairs to $300-$700 for injector replacement.

9. Can a PCM issue cause the P1275 code on a Ford?

Yes, a faulty PCM or incorrect programming can result in an injector circuit malfunction and trigger this code.

10. How do I prevent the P1275 code from recurring on my Ford?

Regular maintenance, including inspecting wiring and connectors and ensuring injectors are clean and functional, can help prevent this code from reappearing.