AutoCodes – Lincoln – P2305 Lincoln

P2305 Lincoln Code - Ignition Coil 'B' 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 '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: P2305 Lincoln indicates Ignition Coil 'B' Secondary Circuit.
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 1,712

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
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Code P2305 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 P2305 code sets when the PCM detects a short to voltage in the circuit.

OBDII Code P2305 Lincoln - Ignition Coil 'B' Secondary Circuit - AutoCodes.com — P2305 Lincoln Code - Ignition Coil 'B' Secondary Circuit

What does this mean?

What are the Possible Causes of the DTC P2305 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 P2305 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 P2305 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 P2305 Lincoln code? Get Access to Factory Service Manuals

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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 P2305 Lincoln Code

1. What does the OBDII code P2305 mean on a Lincoln?

P2305 indicates an issue with the Ignition Coil 'B' Secondary Circuit, which typically points to a malfunction in the ignition coil or its related wiring.

2. What are the symptoms of code P2305 on a Lincoln?

Common symptoms include engine misfires, rough idling, reduced engine performance, poor fuel economy, and the Check Engine Light being illuminated.

3. What causes the P2305 code on a Lincoln?

Possible causes include a faulty ignition coil, damaged or corroded wiring in the ignition circuit, a bad spark plug, or a malfunctioning powertrain control module (PCM).

4. How do you diagnose the P2305 code on a Lincoln?

Diagnosis involves using a scan tool to confirm the code, inspecting the ignition coil and related wiring, testing the coil's resistance, and checking the spark plugs for wear or damage.

5. Can I drive my Lincoln with a P2305 code?

Driving with this code is not recommended, as it can lead to engine misfires, reduced performance, and potential damage to the catalytic converter if left unresolved.

6. How can I fix the P2305 code on my Lincoln?

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

7. How much does it cost to fix the P2305 code on a Lincoln?

Repair costs can range from $100 to $300 for ignition coil or spark plug replacement, but PCM repair or replacement may cost significantly more, depending on the model.

8. What tools are needed to fix the P2305 code on a Lincoln?

Essential tools include an OBDII scanner, a multimeter for testing electrical circuits, and basic hand tools for removing and replacing components.

9. Can a dirty or faulty spark plug cause the P2305 code?

Yes, a worn or fouled spark plug can disrupt the secondary ignition circuit and trigger the P2305 code.

10. How can I prevent the P2305 code from recurring on my Lincoln?

Regular maintenance, including timely replacement of spark plugs and ignition coils, along with inspecting and repairing any damaged wiring, can help prevent this issue.