AutoCodes – Ford – P0356 1999 Ford F150

P0356 1999 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 1999 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 3,310

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 1999 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 1999 Ford F150 - Ignition Coil 'F' Primary/Secondary Circuit - AutoCodes.com — P0356 1999 Ford F150 Code - Ignition Coil 'F' Primary/Secondary Circuit

What does this mean?

What are the Possible Causes of the DTC P0356 1999 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 1999 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 1999 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 1999 Ford F150 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 1999 Ford F150 Code

1. What are the common symptoms of OBDII code P0356 in a 1999 Ford F150?

- Common symptoms include engine misfires, rough idling, loss of power, and illuminated Check Engine Light.

2. What does OBDII code P0356 for Ignition Coil 'F' Primary/Secondary Circuit mean in a 1999 Ford F150?

- It indicates a problem with the ignition coil 'F' circuit, which may affect the coil's primary or secondary functions.

3. What are the possible causes of OBDII code P0356 in a 1999 Ford F150?

- Possible causes include a faulty ignition coil, damaged wiring or connectors in the ignition coil circuit, or a problem with the Engine Control Module (ECM).

4. How can I diagnose the issue causing OBDII code P0356 in my 1999 Ford F150?

- You can use a scan tool to check for additional trouble codes, perform a visual inspection of the ignition coil and its wiring, and use a multimeter to test the coil's resistance and continuity.

5. Can I continue driving my 1999 Ford F150 with OBDII code P0356?

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

6. How can I repair OBDII code P0356 in my 1999 Ford F150?

- Repair options may include replacing the faulty ignition coil, repairing damaged wiring or connectors, or reprogramming the ECM if necessary.

7. Are there any preventive measures to avoid OBDII code P0356 in the future?

- Keeping up with regular maintenance, such as replacing spark plugs and ignition coils at recommended intervals, can help prevent this code from occurring.

8. Can a DIY enthusiast fix OBDII code P0356 in a 1999 Ford F150?

- Depending on your skill level and access to tools, you may be able to diagnose and repair this code yourself, but professional assistance is recommended for more complex issues.

9. How much does it cost to repair OBDII code P0356 in a 1999 Ford F150?

- Repair costs can vary depending on the exact cause of the issue, but replacing an ignition coil typically ranges from $100 to $300, including parts and labor.

10. Will resetting the Check Engine Light clear OBDII code P0356 in my 1999 Ford F150?

- Resetting the light may temporarily turn it off, but if the underlying issue causing the code is not fixed, the Check Engine Light will likely come back on.