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Engine-Codes – Ford – P0352 Ford

P0352 Ford Code - Ignition Coil 'B' Primary/Secondary Circuit

Quick Answer

The P0352 diagnostic trouble code (DTC) for Ford vehicles indicates a problem with the ignition coil 'B' primary/secondary circuit. Common causes include Faulty ignition coil 'B', Wiring issues such as loose connections or damaged wiring, 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
P0352 Ford indicates Ignition Coil 'B' Primary/Secondary Circuit .
Common causes
Common causes include Faulty ignition coil 'B', Wiring issues such as loose connections or damaged wiring, 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 08, 2024
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Code P0352 Ford Description

The P0352 diagnostic trouble code (DTC) for Ford vehicles indicates a problem with the ignition coil 'B' primary/secondary circuit. This code is specifically related to the ignition coil for cylinder number 2 in the engine. The ignition coil is a crucial component of the ignition system, responsible for generating the high voltage needed to create a spark in the spark plugs. When this ignition coil circuit malfunctions, it can lead to a misfire in cylinder 2, causing the engine to run rough, decrease in performance, and potentially even stall.

OBDII Code P0352 Ford - Ignition Coil 'B' Primary/Secondary Circuit
P0352 Ford Code - Ignition Coil 'B' Primary/Secondary Circuit

Common Causes of P0352 Ford

  1. Faulty ignition coil 'B'
  2. Wiring issues such as loose connections or damaged wiring
  3. Issues with the engine control module (ECM)
  4. Corrosion or damage to electrical connections
  5. Extreme heat or vibration damaging the ignition coil

Symptoms of P0352 Ford

  1. Engine misfires or runs rough
  2. Decreased acceleration and power
  3. Engine stalling or difficulty starting
  4. Check Engine Light illuminated on the dashboard

How to Fix P0352 Ford

  1. Begin by diagnosing the specific cause of the issue through a thorough inspection of the ignition coil 'B', wiring, and connections.
  2. If the ignition coil 'B' is found to be faulty, it will need to be replaced with a new, high-quality part.
  3. Check and repair any damaged wiring or connections in the ignition coil circuit.
  4. Clear the DTC codes from the ECM using a diagnostic tool and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnostics may be necessary to identify and address any underlying issues.

Cost to Fix P0352 Ford

The cost of repairing the ignition coil 'B' primary/secondary circuit issue can vary depending on the specific cause of the problem and the labor rates in your area. On average, the cost of replacing an ignition coil can range from $100 to $300, including parts and labor. Additional costs may apply if there are wiring issues or other underlying problems that need to be addressed. It is recommended to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on your vehicle make and model.

What does this mean?

Tech Notes for P0352 Ford

Ford Ignition Coil Primary Codes P0351-P0360 Diagnostic Walk through





User Submitted Video

When is the Code Detected?

Each ignition circuit is continuously monitored by the Engine Control Module (ECM). The test fails when the 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 P0352 Ford Code

1. What are the common symptoms of OBDII code P0352 for a Ford vehicle?

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

2. What does the OBDII code P0352 for a Ford indicate?

- The code indicates a problem with the Ignition Coil 'B' Primary/Secondary Circuit.

3. What are the possible causes of OBDII code P0352 in a Ford?

- Possible causes include a faulty ignition coil, damaged wiring or connectors in the ignition coil circuit, or issues with the engine control module (ECM).

4. How can I diagnose the issue related to OBDII code P0352 in my Ford?

- You can use a scan tool to check for the code, visually inspect the ignition coil and its connections, and perform a continuity test on the wiring.

5. Is it safe to drive my Ford with OBDII code P0352?

- It is not recommended to drive your vehicle with this code as it can lead to further damage and poor engine performance.

6. Can I repair OBDII code P0352 in my Ford at home?

- Depending on your experience and tools, you may be able to replace the faulty ignition coil or repair damaged wiring yourself. However, seeking professional help is advisable for accurate diagnosis and repair.

7. How much does it cost to fix OBDII code P0352 in a Ford?

- The cost can vary depending on the exact cause of the issue, but it typically ranges from $100 to $300 for parts and labor.

8. Will resetting the check engine light resolve OBDII code P0352 in my Ford?

- Resetting the light will only temporarily clear the code, but the underlying issue causing P0352 needs to be identified and fixed to prevent it from reoccurring.

9. Can a bad spark plug cause OBDII code P0352 in a Ford?

- While a bad spark plug can potentially contribute to ignition coil issues, it is not a direct cause of OBDII code P0352. Focus on checking the ignition coil and related components first.

10. Should I replace all ignition coils if OBDII code P0352 is detected in my Ford?

- It is not necessary to replace all ignition coils if only one is causing the issue. Start by diagnosing and replacing the faulty ignition coil identified by the code.

Discuss the causes and fixes for P0352 Ford OBDII Code

Submit a New Comment

  • 2016 f150 5.0 I have a misfire on cylinder 2 p0352 now if checked and fixed the connector , and I have power and ground at coil if put a spark indictor in the coil and spark is present but I'm still getting the same code p0352 and I have 150 lbs. of compression on every cylinder on bank 1 any ideals ( Maybe injector ) ?

    Reply to Comment

    • Good job checking the basics first — that saves a lot of guessing.

      If you truly have:
      • Good power to the coil
      • Good ground
      • Spark present with a tester
      • 150 psi compression
      • And the connector has been repaired

      Then the situation changes a bit.

      P0352 is not just a misfire code — it’s a coil primary circuit fault. That means the PCM is unhappy with what it’s seeing electrically on that coil control circuit. Even if the coil is firing, the PCM may still detect an abnormal voltage pattern on the control wire.

      A few things I’d check next:

      1. Swap the coil with another cylinder (even if spark looks good). See if the code follows. A coil can fire but still have internal resistance issues that trigger a circuit code.

      2. Check the control wire from the PCM to that coil for high resistance or partial breaks. A wire can show power and ground but still have signal distortion under load.

      3. Use a lab scope if possible to look at the coil primary waveform. A multimeter won’t catch signal abnormalities.

      4. Check for oil in the plug well. On the 5.0, valve cover leaks can cause intermittent issues.

      5. Yes — an injector problem can cause a misfire, but it would not normally trigger P0352. An injector issue would more likely set a cylinder-specific misfire code, not a coil circuit code.

      If everything checks out and the wiring is solid, the last possibility (less common, but real) is a failing PCM driver for that coil.

      The key detail here is this: if the PCM keeps setting P0352, it’s seeing something wrong electrically — not just a combustion misfire.

      I’d focus on the coil control circuit and waveform before chasing fuel.

      Reply to Comment