AutoCodes – Ford – P0354 2003 Ford F150

P0354 2003 Ford F150 Code - Ignition Coil 'D' Primary/Secondary Circuit

Quick Answer

The ignition system on the vehicle uses individual ignition coils for each cylinder. Common causes include Faulty Ignition Coil 4, Ignition Coil 4 harness is open or shorted, Ignition Coil 4 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: P0354 2003 Ford F150 indicates Ignition Coil 'D' Primary/Secondary Circuit .
Common causes: Common causes include Faulty Ignition Coil 4, Ignition Coil 4 harness is open or shorted, Ignition Coil 4 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 8,739

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0354 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 P0354 2003 Ford F150 - Ignition Coil 'D' Primary/Secondary Circuit - AutoCodes.com — P0354 2003 Ford F150 Code - Ignition Coil 'D' Primary/Secondary Circuit

What does this mean?

What are the Possible Causes of the DTC P0354 2003 Ford F150?

Faulty Ignition Coil 4
Ignition Coil 4 harness is open or shorted
Ignition Coil 4 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0354 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 P0354 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 P0354 2003 Ford F150 code?

Need more information on how to fix the P0354 2003 Ford F150 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0354 2003 Ford F150 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 P0354 2003 Ford F150 Code

1. What does the OBDII code P0354 mean for a 2003 Ford F150?

P0354 indicates an issue with the ignition coil "D" primary or secondary circuit, which may involve electrical problems or coil failure.

2. What are the symptoms of code P0354 in a 2003 Ford F150?

Common symptoms include engine misfires, rough idling, reduced power, poor fuel economy, and the check engine light turning on.

3. What causes the P0354 code in a 2003 Ford F150?

Possible causes include a faulty ignition coil, damaged wiring or connectors in the ignition coil circuit, or a malfunctioning PCM (Powertrain Control Module).

4. How can I identify which ignition coil is "D" on my 2003 Ford F150?

Ignition coil "D" corresponds to the fourth cylinder in the engine's firing order. Refer to your vehicle's specific firing order diagram for exact placement.

5. Can I drive my 2003 Ford F150 with a P0354 code?

Driving with this code is not recommended, as it can cause engine misfires and potentially damage the catalytic converter over time.

6. How do I fix the P0354 code on a 2003 Ford F150?

Repairs may include replacing the faulty ignition coil, repairing damaged wiring or connectors, or reprogramming or replacing the PCM if necessary.

7. How do I test the ignition coil for a P0354 code?

Use a multimeter to check the resistance of the ignition coil and inspect for proper voltage supply. If the readings are out of range, the coil may need replacement.

8. What tools are needed to fix a P0354 code?

Common tools include a multimeter, OBDII scanner, basic hand tools (like a socket set), and potentially a wiring diagram for troubleshooting.

9. Could a bad spark plug cause the P0354 code?

While a bad spark plug isnâ€™t the direct cause, it can contribute to ignition issues that may trigger this code, so itâ€™s worth inspecting and replacing if needed.

10. How much does it cost to fix the P0354 code on a 2003 Ford F150?

Repair costs vary, but replacing an ignition coil typically costs $50â€“$150 for parts, plus labor if done by a mechanic. Additional costs may apply if wiring or PCM repairs are needed.