AutoCodes – Lincoln – P2304 Lincoln

P2304 Lincoln Code - Ignition Coil 'B' Primary Control Circuit High

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 'B', Ignition Coil 'B' harness is open or shorted, Ignition Coil 'B' 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: P2304 Lincoln indicates Ignition Coil 'B' Primary Control Circuit High.
Common causes: Common causes include Faulty Ignition Coil 'B', Ignition Coil 'B' harness is open or shorted, Ignition Coil 'B' 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 1,175

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 P2304 Lincoln 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 P2304 code sets when the PCM detects a short to voltage in the circuit.

OBDII Code P2304 Lincoln - Ignition Coil 'B' Primary Control Circuit High - AutoCodes.com — P2304 Lincoln Code - Ignition Coil 'B' Primary Control Circuit High

What does this mean?

What are the Possible Causes of the DTC P2304 Lincoln?

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

How to Fix the DTC P2304 Lincoln?

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 P2304 Lincoln 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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Need more information on how to fix the P2304 Lincoln code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2304 Lincoln 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 P2304 Lincoln Code

What does the OBD-II code P2304 mean for a Lincoln vehicle?

P2304 indicates an issue with the Ignition Coil 'B' Primary Control Circuit, specifically a high voltage condition detected by the PCM.

What are the common symptoms of code P2304 in a Lincoln?

Typical symptoms include engine misfires, rough idling, reduced acceleration, poor fuel economy, and the Check Engine Light turning on.

What causes the P2304 code to appear?

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

How can I diagnose the P2304 code?

Use an OBD-II scanner to confirm the code, inspect ignition coil 'B' and its wiring for visible damage, and check for continuity or resistance in the circuit using a multimeter.

Can driving with the P2304 code damage my Lincoln?

Yes, driving with this code can lead to engine misfires, which may cause damage to the catalytic converter or other engine components over time.

How do you fix the P2304 code?

Repairs often include replacing the faulty ignition coil, repairing or replacing damaged wiring or connectors, and, in rare cases, replacing the PCM.

How much does it cost to repair a P2304 code?

The cost varies depending on the issue but typically ranges from $100 to $300 for parts and labor, with ignition coil replacement being a common solution.

Can a bad spark plug cause the P2304 code?

While less common, a bad spark plug can indirectly contribute to ignition coil issues, so itâ€™s worth inspecting the spark plugs during diagnosis.

Is P2304 specific to Lincoln vehicles?

No, P2304 can appear on any vehicle with OBD-II diagnostics, but the diagnostic steps and repairs may vary between makes and models.

How can I prevent the P2304 code from occurring?

Regular maintenance, including inspecting ignition components, replacing spark plugs at recommended intervals, and addressing wiring issues promptly, can help prevent this code.