AutoCodes – Ford – P0350 2003 Ford F150

P0350 2003 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 2003 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 3,216
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code P0350 2003 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 2003 Ford F150 - Ignition Coil Primary Secondary Circuit Malfunction  - AutoCodes.com
P0350 2003 Ford F150 Code - Ignition Coil Primary Secondary Circuit Malfunction

What are the Possible Causes of the DTC P0350 2003 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 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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0350 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 P0350 2003 Ford F150 code?

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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 P0350 2003 Ford F150 Code

1. What are the common symptoms of OBDII code P0350 on a 2003 Ford F150?

- Common symptoms include engine misfires, rough idling, loss of power, and possibly a flashing check engine light.

2. What causes the ignition coil primary/secondary circuit malfunction in a 2003 Ford F150?

- The primary causes can be a faulty ignition coil, damaged wiring or connectors, or a problem with the engine control module (ECM).

3. How can I diagnose the issue related to OBDII code P0350 on my 2003 Ford F150?

- Use a diagnostic scanner to retrieve the code and inspect the ignition coil, wiring, and connectors for any visible damage or corrosion.

4. Can a bad spark plug cause the OBDII code P0350 on a 2003 Ford F150?

- Yes, a faulty spark plug can lead to ignition coil issues and trigger the P0350 code.

5. What is the best way to repair the ignition coil primary/secondary circuit malfunction on a 2003 Ford F150?

- The most effective repair is to replace the faulty ignition coil and address any wiring or connector issues.

6. Are there any maintenance tips to prevent OBDII code P0350 from occurring on a 2003 Ford F150?

- Regularly inspect and replace spark plugs, ignition coils, and related components as part of routine maintenance to prevent potential issues.

7. Can driving with OBDII code P0350 on a 2003 Ford F150 cause further damage?

- Driving with this code may lead to prolonged engine misfires, reduced fuel efficiency, and potential damage to the catalytic converter over time.

8. How much does it typically cost to repair the ignition coil primary/secondary circuit malfunction on a 2003 Ford F150?

- The cost can vary depending on the specific issue, but replacing an ignition coil can range from $100 to $300, including parts and labor.

9. Is it safe to continue driving my 2003 Ford F150 with the OBDII code P0350 present?

- It is not recommended to drive the vehicle with this code as it can lead to performance issues and potential engine damage if left unresolved.

10. Will resetting the check engine light resolve the OBDII code P0350 on a 2003 Ford F150?

- Resetting the check engine light may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear.

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