AutoCodes – Ford – P2329 Ford

P2329 Ford Code - Ignition Coil 'J' Secondary Circuit

Quick Answer

The current flow, or dwell, through the primary ignition coil is controlled by the Powertrain Control Module (PCM) by providing a switched ground path through the ignition coil driver to ground. Common causes include Faulty Ignition Coil 'J', Ignition Coil 'J' harness is open or shorted, Ignition Coil 'J' 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: P2329 Ford indicates Ignition Coil 'J' Secondary Circuit.
Common causes: Common causes include Faulty Ignition Coil 'J', Ignition Coil 'J' harness is open or shorted, Ignition Coil 'J' 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 1,388

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2329 Ford Description

The current flow, or dwell, through the primary ignition coil is controlled by the Powertrain Control Module (PCM) by providing a switched ground path through the ignition coil driver to ground. When the ignition coil driver is switched on, current rapidly builds up to a maximum value, determined by the coil inductance and resistance. When the current is switched off, the magnetic field collapses which induces a secondary high voltage surge and the spark plug is fired. This high voltage surge creates a flyback voltage which the PCM uses as a feedback during the ignition diagnostics. The PCM continuously monitors the ignition system for concerns. The P2329 code sets when the PCM detects a short to voltage in the circuit.

OBDII Code P2329 Ford - Ignition Coil 'J' Secondary Circuit - AutoCodes.com — P2329 Ford Code - Ignition Coil 'J' Secondary Circuit

What does this mean?

What are the Possible Causes of the DTC P2329 Ford?

Faulty Ignition Coil 'J'
Ignition Coil 'J' harness is open or shorted
Ignition Coil 'J' circuit poor electrical connection

How to Fix the DTC P2329 Ford?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2329 Ford 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.

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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 P2329 Ford Code

1. What does the OBDII code P2329 mean for a Ford vehicle?

P2329 indicates a fault in the ignition coil 'J' secondary circuit, suggesting an issue with the high-voltage side of the ignition coil responsible for proper spark delivery.

2. What are the common symptoms of a P2329 code in a Ford?

Symptoms may include engine misfiring, rough idling, reduced power, poor fuel economy, or the Check Engine Light illuminating.

3. What causes the P2329 code to appear?

Common causes include a damaged ignition coil, faulty spark plugs, issues with the wiring or connectors in the ignition coil circuit, or a malfunctioning PCM (Powertrain Control Module).

4. Can a faulty ignition coil cause a P2329 code?

Yes, a defective ignition coil is one of the most common causes of the P2329 code, as it directly affects the secondary circuit's performance.

5. How do you diagnose a P2329 code on a Ford vehicle?

Begin by scanning for codes and inspecting the ignition coil 'J' and its wiring. Look for damage, corrosion, or loose connections. Test the ignition coil and spark plug for proper functionality.

6. Is it safe to drive with the P2329 code active?

Driving with this code is not recommended, as it can lead to poor engine performance, potential damage to the catalytic converter, and other engine components.

7. How can the P2329 code be fixed?

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

8. Can a bad spark plug trigger the P2329 code?

Yes, a worn or damaged spark plug can cause issues in the ignition coil's secondary circuit, potentially triggering the P2329 code.

9. How much does it typically cost to fix a P2329 code on a Ford?

The cost varies but typically ranges from $100 to $300 for parts and labor, depending on whether the ignition coil, spark plugs, or wiring needs repair.

10. Can a P2329 code be caused by a PCM issue?

While rare, a malfunctioning PCM can cause the P2329 code if it fails to properly control the ignition coil circuit.