AutoCodes – Mercury – P2329 Mercury

P2329 Mercury 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 Mercury 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,103

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

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

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

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

What does this mean?

What are the Possible Causes of the DTC P2329 Mercury?

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 Mercury?

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 Mercury 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 P2329 Mercury code?

Need more information on how to fix the P2329 Mercury code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2329 Mercury code diagnosed by a professional: Find a repair shop in your area

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 Mercury Code

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

P2329 indicates an issue with the ignition coil 'J' secondary circuit, suggesting a fault in the coil's ability to deliver a proper spark.

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

Common symptoms include engine misfires, rough idling, reduced power, decreased fuel efficiency, and potentially the Check Engine Light turning on.

3. What causes the P2329 code to appear?

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

4. Can I drive my Mercury with a P2329 code?

Driving with this code is not recommended as it can lead to further engine damage, poor performance, and increased emissions.

5. How do I diagnose the P2329 code on my Mercury?

Diagnose by inspecting the ignition coil 'J', checking for damaged or corroded wiring, testing the spark plug, and using a multimeter to verify voltage and resistance in the circuit.

6. What is the ignition coil 'J' in my Mercury?

The ignition coil 'J' refers to a specific coil in your vehicle's ignition system, typically associated with a particular cylinder.

7. How do I fix the P2329 code on my Mercury?

Fixes include replacing the faulty ignition coil, repairing damaged wiring, replacing the spark plug, or addressing issues with the PCM if necessary.

8. How much does it cost to repair a P2329 code on a Mercury?

Repair costs can range from $100 to $400, depending on whether the ignition coil, spark plug, or wiring needs replacement and labor costs.

9. Will clearing the code fix the P2329 issue?

Clearing the code may turn off the Check Engine Light temporarily, but the underlying issue must be addressed to prevent the code from returning.

10. Can a bad PCM cause the P2329 code in my Mercury?

Yes, a faulty PCM can cause this code if it fails to properly control the ignition coil's operation, though this is less common than coil or wiring issues.