AutoCodes – Ford – P2303 Ford

P2303 Ford Code - Ignition Coil 'B' Primary Control Circuit Low

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
P2303 Ford indicates Ignition Coil 'B' Primary Control Circuit Low.
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 7,872
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code P2303 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 P2303 code sets when the PCM detects a short to voltage in the circuit.
OBDII Code P2303 Ford - Ignition Coil 'B' Primary Control Circuit Low - AutoCodes.com
P2303 Ford Code - Ignition Coil 'B' Primary Control Circuit Low

What are the Possible Causes of the DTC P2303 Ford?

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

How to Fix the DTC P2303 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 P2303 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.

Need more information about the P2303 Ford code?

Need more information on how to fix the P2303 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2303 Ford 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 P2303 Ford Code

1. What are the common symptoms of OBDII code P2303 in a Ford related to the Ignition Coil 'B' Primary Control Circuit Low?

The common symptoms include misfires, rough idle, lack of power, and potentially stalling of the engine.

2. What are the possible causes of OBDII code P2303 in a Ford related to the Ignition Coil 'B' Primary Control Circuit Low?

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

3. How can I diagnose the issue causing OBDII code P2303 in a Ford related to the Ignition Coil 'B' Primary Control Circuit Low?

You can diagnose the issue by checking the ignition coil for proper functioning, inspecting the wiring and connectors for any damage, and using a scan tool to analyze the data from the PCM.

4. Can I continue driving my Ford with OBDII code P2303 related to the Ignition Coil 'B' Primary Control Circuit Low?

It is not recommended to drive your vehicle with this issue as it can lead to further damage to the engine and other components.

5. How can I repair OBDII code P2303 in a Ford related to the Ignition Coil 'B' Primary Control Circuit Low?

To repair this issue, you may need to replace the faulty ignition coil, repair any damaged wiring or connectors, or reprogram the PCM if necessary.

6. Will resetting the OBDII code P2303 related to the Ignition Coil 'B' Primary Control Circuit Low make it go away permanently?

Simply resetting the code may temporarily clear the warning light, but the underlying issue causing the code will persist until properly diagnosed and repaired.

7. Are there any preventive measures to avoid OBDII code P2303 related to the Ignition Coil 'B' Primary Control Circuit Low in a Ford?

Regularly maintaining your vehicle, including checking the ignition system and related components, can help prevent issues that may trigger this error code.

8. Can a DIY enthusiast fix OBDII code P2303 related to the Ignition Coil 'B' Primary Control Circuit Low in a Ford?

Depending on your skill level and access to tools, a DIY enthusiast may be able to diagnose and repair this issue, but it is recommended to consult a professional if unsure.

9. How much does it typically cost to repair OBDII code P2303 related to the Ignition Coil 'B' Primary Control Circuit Low in a Ford?

The cost of repair can vary depending on the specific issue causing the code, but it may range from $100 to $300 for parts and labor.

10. Is OBDII code P2303 related to the Ignition Coil 'B' Primary Control Circuit Low a common issue in Ford vehicles?

While not extremely common, issues related to the ignition coil circuit can occur in Ford vehicles, leading to the triggering of this error code.

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