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Engine-Codes – Ford – P0350 Ford

P0350 Ford Code - Ignition Coil Primary/Secondary Circuit

Quick Answer

The P0350 Ford code indicates a problem with the primary or secondary circuit of the ignition coil. Common causes include Faulty ignition coil, Damaged wiring or connectors in the ignition coil circuit, Issues with the engine control module (ECM). 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 Ford indicates Ignition Coil Primary/Secondary Circuit .
Common causes
Common causes include Faulty ignition coil, Damaged wiring or connectors in the ignition coil circuit, Issues with the engine control module (ECM).
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P0350 Ford Description

The P0350 Ford code indicates a problem with the primary or secondary circuit of the ignition coil. The ignition coil is responsible for converting the low voltage power from the battery into the high voltage needed to ignite the fuel and air mixture in the engine's combustion chamber. When this circuit is malfunctioning, it can lead to misfiring, rough idling, poor fuel efficiency, and even engine stalling.

OBDII Code P0350 Ford - Ignition Coil Primary/Secondary Circuit
P0350 Ford Code - Ignition Coil Primary/Secondary Circuit

Common Causes of P0350 Ford

  1. Faulty ignition coil
  2. Damaged wiring or connectors in the ignition coil circuit
  3. Issues with the engine control module (ECM)
  4. Spark plug issues
  5. Corrosion or moisture in the ignition system

Symptoms of P0350 Ford

  1. Engine misfires
  2. Rough idling
  3. Poor fuel efficiency
  4. Engine stalling
  5. Illumination of the Check Engine Light

How to Fix P0350 Ford

  1. Diagnose the specific cause of the issue using a scan tool to pinpoint the faulty ignition coil or wiring.
  2. Test the ignition coil using a multimeter to check for proper resistance and continuity.
  3. Replace the faulty ignition coil or repair damaged wiring or connectors in the ignition coil circuit.
  4. Clear the diagnostic trouble codes from the vehicle's ECM and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnostics may be needed to identify any underlying issues with the ECM or other components.

Cost to Fix P0350 Ford

The typical repair costs for addressing the P0350 Ford code can range from $150 to $500, including the cost of parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary significantly based on factors such as location, vehicle make and model, and engine type. It's advisable to check local rates for a more precise estimate before proceeding with the repairs.

When is the Code Detected?

The test fails when the Engine Control Module (ECM) does not receive a valid pulse signal from the ignition coil.

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Information for Specific Ford Models

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 Ford Code

No Frequently Asked Questions about P0350 Ford Code found.

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  • Yes. The #1 ignition coil has been replaced twice. Every time it runs rough for about a 3-4 days and check engine light comes back on. Sometimes it runs fine after that on the way to work in the am but runs rough in the pm. I'm wondering if heat has any thing to cause it but then again it might hiccup a time or 2 in the am. I had the #5 replaced and no problem. Do you think it's possible to get 3 defective coil packs or maybe the mechanic is not installing properly?

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  • What model and year is your Ford? It very unlikely to have 3 bad ignition coils. Check engine grounds (batter negative terminals to engine), poor grounds could cause premature components failure.

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  • My Ford Escape is 2001.

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  • Are you using factory (factory specifications) ignition coils? did you replaced the spark plugs with the coils? bad spark plugs coils also cause premature ignition coil failure.

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  • The mechanic replaced spark plugs on all. Moved 2 good coil packs to back so older ones would be in front so theyd be easier to get to if they went bad put new one in #1

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