AutoCodes – Ford – P0356 2003 Ford F150

P0356 2003 Ford F150 Code - Ignition Coil 'F' Primary/Secondary Circuit

Quick Answer

The ignition system on the vehicle uses individual ignition coils for each cylinder. Common causes include Faulty Ignition Coil 6, Ignition Coil 6 harness is open or shorted, Ignition Coil 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: P0356 2003 Ford F150 indicates Ignition Coil 'F' Primary/Secondary Circuit .
Common causes: Common causes include Faulty Ignition Coil 6, Ignition Coil 6 harness is open or shorted, Ignition Coil 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 8,253

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0356 2003 Ford F150 Description

The ignition system on the vehicle uses individual ignition coils for each cylinder. The Engine Control Module (ECM) controls each ignition coil operation. The ECM sends a ON/OFF signal to energize the ignition coil to create a spark at the spark plug when a spark is required at the cylinder.

OBDII Code P0356 2003 Ford F150 - Ignition Coil 'F' Primary/Secondary Circuit - AutoCodes.com — P0356 2003 Ford F150 Code - Ignition Coil 'F' Primary/Secondary Circuit

What does this mean?

What are the Possible Causes of the DTC P0356 2003 Ford F150?

Faulty Ignition Coil 6
Ignition Coil 6 harness is open or shorted
Ignition Coil 6 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0356 2003 Ford F150?

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

Each ignition primary circuit is continuously monitored. The test fails when the PCM does not receive a valid IDM pulse signal from the ignition module (integrated in PCM).

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0356 2003 Ford F150 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 P0356 2003 Ford F150 code?

Need more information on how to fix the P0356 2003 Ford F150 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 P0356 2003 Ford F150 Code

1. What are the common symptoms associated with OBDII code P0356 on a 2003 Ford F150?

Symptoms may include misfiring engine, rough idling, loss of power, and illuminated Check Engine Light.

2. What does the OBDII code P0356 for a 2003 Ford F150 indicate?

The code P0356 indicates a problem with the ignition coil 'F' primary/secondary circuit.

3. What are possible causes of OBDII code P0356 on a 2003 Ford F150?

Common causes include a faulty ignition coil, wiring issues in the ignition coil circuit, or a problem with the PCM.

4. How can I diagnose the cause of OBDII code P0356 on my 2003 Ford F150?

Diagnosis typically involves checking the ignition coil 'F', inspecting the wiring and connectors, and testing the PCM for proper functionality.

5. Can I still drive my 2003 Ford F150 with OBDII code P0356?

It is not recommended to drive the vehicle with a misfiring engine as it can lead to further damage. It's best to address the issue promptly.

6. How can I repair OBDII code P0356 on a 2003 Ford F150?

Repair options may include replacing the faulty ignition coil 'F', repairing damaged wiring, or reprogramming the PCM if necessary.

7. Are there any maintenance tips to prevent OBDII code P0356 on a 2003 Ford F150?

Regularly inspecting the ignition system components, addressing any issues promptly, and following the recommended maintenance schedule can help prevent this code.

8. Can a DIY enthusiast fix OBDII code P0356 on a 2003 Ford F150?

Depending on the level of expertise, a DIY enthusiast may be able to diagnose and replace the faulty ignition coil or address wiring issues. However, professional assistance is recommended for complex repairs.

9. Will resetting the Check Engine Light resolve OBDII code P0356 on a 2003 Ford F150?

Resetting the light may temporarily turn it off, but if the underlying issue causing the code is not addressed, the light is likely to come back on.

10. Is it necessary to have the OBDII code P0356 cleared after repairs on a 2003 Ford F150?

After repairing the issue causing the code, it is recommended to clear the code using an OBDII scanner to ensure the Check Engine Light does not reappear due to the stored code.