AutoCodes – Ford – P0380 Ford

P0380 Ford Code - Glow Plug/Heater Circuit 'A' Malfunction

Quick Answer

The glow plug system is used to assist in providing the heat required to begin combustion during cold engine temperatures. Common causes include Faulty Glow Plug, Glow Plug harness is open or shorted, Glow Plug 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: P0380 Ford indicates Glow Plug/Heater Circuit 'A' Malfunction.
Common causes: Common causes include Faulty Glow Plug, Glow Plug harness is open or shorted, Glow Plug 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 4,529

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 11, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0380 Ford Description

The glow plug system is used to assist in providing the heat required to begin combustion during cold engine temperatures. The glow plugs are heated before and during cranking, as well as initial engine operation. The Engine Control Module (ECM) controls the glow plug ON times by monitoring coolant temperature and glow plug voltage. The California Glow Plug system has eight individual glow plug supply circuits between the controller and the glow plugs. If the feedback voltage from the controller to the ECM is not within range, DTC P0380 will set.

OBDII Code P0380 Ford - Glow Plug/Heater Circuit 'A' Malfunction - AutoCodes.com — P0380 Ford Code - Glow Plug/Heater Circuit 'A' Malfunction

What does this mean?

What are the Possible Causes of the DTC P0380 Ford?

Faulty Glow Plug
Glow Plug harness is open or shorted
Glow Plug circuit poor electrical connection

How to Fix the DTC P0380 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0380 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 P0380 Ford Code

1. What are the common symptoms of OBDII code P0380 in a Ford related to the Glow Plug/Heater Circuit 'A' Malfunction?

- Common symptoms include difficult starting, rough idling, misfiring, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P0380 in a Ford related to the Glow Plug/Heater Circuit 'A' Malfunction?

- Possible causes include faulty glow plugs, a defective glow plug relay, wiring issues, or a malfunctioning powertrain control module (PCM).

3. How can I diagnose the Glow Plug/Heater Circuit 'A' Malfunction in a Ford when OBDII code P0380 is triggered?

- Use a multimeter to test the resistance of each glow plug, check the glow plug relay for proper functioning, inspect the wiring for any damage, and scan the PCM for error codes.

4. Is it safe to continue driving my Ford with OBDII code P0380 related to Glow Plug/Heater Circuit 'A' Malfunction?

- It is not recommended to drive the vehicle with this code as it may lead to difficulty starting and potential engine damage due to inadequate combustion.

5. How can I repair OBDII code P0380 in a Ford related to the Glow Plug/Heater Circuit 'A' Malfunction?

- Replace any faulty glow plugs, repair or replace the glow plug relay if necessary, repair damaged wiring, and clear the error code with a diagnostic tool.

6. Can a DIY enthusiast fix OBDII code P0380 in a Ford related to the Glow Plug/Heater Circuit 'A' Malfunction?

- Yes, simple tasks like replacing glow plugs can be done by a DIY enthusiast with basic mechanical skills and the right tools.

7. Will fixing OBDII code P0380 in a Ford related to the Glow Plug/Heater Circuit 'A' Malfunction improve fuel efficiency?

- Yes, addressing this issue can improve fuel efficiency by ensuring proper combustion and engine performance.

8. How long does it typically take to repair OBDII code P0380 in a Ford related to the Glow Plug/Heater Circuit 'A' Malfunction?

- The repair time can vary depending on the exact cause, but it usually takes a few hours to diagnose and fix the issue.

9. Are there any preventive measures to avoid OBDII code P0380 in a Ford related to the Glow Plug/Heater Circuit 'A' Malfunction?

- Regularly inspecting and maintaining the glow plug system, especially in colder climates, can help prevent this code from appearing.

10. Can a malfunctioning glow plug affect the overall performance of the Ford vehicle?

- Yes, a malfunctioning glow plug can lead to poor engine performance, reduced fuel efficiency, and potential damage to the engine if not addressed promptly.