AutoCodes – Ford – P0350 1999 Ford F150

P0350 1999 Ford F150 Code - Ignition Coil Primary Secondary Circuit Malfunction

Quick Answer

The ignition signal from the Engine Control Module (ECM) is sent to and amplified by the power transistor. Common causes include Faulty Ignition Coil Primary/Secondary, Ignition Coil Primary/Secondary harness is open or shorted, Ignition Coil Primary/Secondary 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: P0350 1999 Ford F150 indicates Ignition Coil Primary Secondary Circuit Malfunction .
Common causes: Common causes include Faulty Ignition Coil Primary/Secondary, Ignition Coil Primary/Secondary harness is open or shorted, Ignition Coil Primary/Secondary 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 2,497

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 P0350 1999 Ford F150 Description

The ignition signal from the Engine Control Module (ECM) is sent to and amplified by the power transistor. The power transistor turns ON and OFF the ignition coil primary circuit. This ON/OFF operation induces the proper high voltage in the coil secondary circuit.

OBDII Code P0350 1999 Ford F150 - Ignition Coil Primary Secondary Circuit Malfunction - AutoCodes.com — P0350 1999 Ford F150 Code - Ignition Coil Primary Secondary Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P0350 1999 Ford F150?

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

How to Fix the DTC P0350 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 P0350 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 P0350 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 P0350 1999 Ford F150 Code

1. What are the common symptoms of OBDII code P0350 on a 1999 Ford F150?

- Common symptoms include engine misfires, rough idling, loss of power, and difficulty starting the vehicle.

2. What are the possible causes of the Ignition Coil Primary/Secondary Circuit Malfunction in a 1999 Ford F150?

- Possible causes may include a faulty ignition coil, damaged wiring or connectors, a defective PCM (powertrain control module), or a blown fuse.

3. How can I diagnose the Ignition Coil Primary/Secondary Circuit Malfunction on my 1999 Ford F150?

- Diagnosis typically involves using a scan tool to read the OBDII code, inspecting the ignition coil and its connections, testing the coil for proper resistance, and checking the wiring for any damage.

4. Can I still drive my 1999 Ford F150 with OBDII code P0350?

- It is not recommended to drive the vehicle with a P0350 code, as it can lead to further engine damage and potential safety hazards. It is best to address the issue promptly.

5. How can I repair the Ignition Coil Primary/Secondary Circuit Malfunction on my 1999 Ford F150?

- Repair options may include replacing the faulty ignition coil, repairing or replacing damaged wiring or connectors, resetting the PCM, or addressing any other underlying issues causing the malfunction.

6. Are there any preventative maintenance tips to avoid OBDII code P0350 on a 1999 Ford F150?

- Regularly inspecting and servicing the ignition system, including the ignition coil, spark plugs, and wiring, can help prevent issues that may lead to the P0350 code.

7. Can a DIY enthusiast fix the Ignition Coil Primary/Secondary Circuit Malfunction on a 1999 Ford F150?

- Depending on the individual's skill level and access to tools, a DIY enthusiast may be able to diagnose and repair the issue. However, complex electrical issues may require professional assistance.

8. How much does it cost to repair OBDII code P0350 on a 1999 Ford F150?

- Repair costs can vary depending on the exact cause of the issue, labor rates in your area, and whether you choose to address the problem yourself or take it to a mechanic. Costs can range from $100 to $500 or more.

9. Will resetting the OBDII code P0350 on a 1999 Ford F150 make it go away permanently?

- Simply resetting the code may temporarily clear the error message, but if the underlying issue causing the P0350 code is not addressed, the code is likely to reappear.

10. Can a bad ignition coil cause other OBDII codes to appear on a 1999 Ford F150?

- Yes, a faulty ignition coil can lead to various other OBDII codes related to misfires, fuel delivery issues, and overall engine performance problems.