AutoCodes – Volkswagen – P2318 Volkswagen

P2318 Volkswagen Code - Ignition Coil 7 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 7, Ignition Coil 7 harness is open or shorted, Ignition Coil 7 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
P2318 Volkswagen indicates Ignition Coil 7 Primary Control Circuit Low.
Common causes
Common causes include Faulty Ignition Coil 7, Ignition Coil 7 harness is open or shorted, Ignition Coil 7 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 2,795
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 P2318 Volkswagen 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 P2318 code sets when the PCM detects a short to voltage in the circuit.
OBDII Code P2318 Volkswagen - Ignition Coil 7 Primary Control Circuit Low - AutoCodes.com
P2318 Volkswagen Code - Ignition Coil 7 Primary Control Circuit Low

What are the Possible Causes of the DTC P2318 Volkswagen?

  • Faulty Ignition Coil 7
  • Ignition Coil 7 harness is open or shorted
  • Ignition Coil 7 circuit poor electrical connection

How to Fix the DTC P2318 Volkswagen?

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 P2318 Volkswagen 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 P2318 Volkswagen code?

Need more information on how to fix the P2318 Volkswagen code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2318 Volkswagen 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 P2318 Volkswagen Code

1. What are the common symptoms of OBDII code P2318 in a Volkswagen related to Ignition Coil 7 Primary Control Circuit Low?

The common symptoms include engine misfires, rough idle, loss of power, and illuminated Check Engine Light.

2. What can cause the OBDII code P2318 in a Volkswagen related to Ignition Coil 7 Primary Control Circuit Low?

Possible causes include a faulty ignition coil, wiring issues in the primary control circuit, a poor electrical connection, or a problem with the Engine Control Module (ECM).

3. How can I diagnose the OBDII code P2318 in a Volkswagen related to Ignition Coil 7 Primary Control Circuit Low?

You can diagnose this code by performing a visual inspection of the ignition coil and its wiring, checking the electrical connections, using a multimeter to test for continuity, and scanning the ECM for any related fault codes.

4. Can I still drive my Volkswagen with the OBDII code P2318 related to Ignition Coil 7 Primary Control Circuit Low?

It is not recommended to drive your vehicle with this code, as it can lead to further damage to the engine and affect its performance. It's best to address the issue promptly.

5. How do I repair the OBDII code P2318 in a Volkswagen related to Ignition Coil 7 Primary Control Circuit Low?

To repair this code, you may need to replace the faulty ignition coil, repair any damaged wiring or connections, clear the fault code, and perform a test drive to ensure the issue has been resolved.

6. Can a DIY enthusiast fix the OBDII code P2318 related to Ignition Coil 7 Primary Control Circuit Low in a Volkswagen?

Depending on your experience and tools available, you may be able to address this issue yourself. However, if you are unsure or inexperienced, it's best to seek professional help to avoid causing more damage.

7. Is it necessary to reset the ECM after repairing the OBDII code P2318 in a Volkswagen related to Ignition Coil 7 Primary Control Circuit Low?

Yes, it is recommended to reset the ECM after repairing the issue to clear the fault code and ensure the system recognizes the repair. This can be done using an OBDII scanner.

8. Will the Check Engine Light turn off automatically after fixing the OBDII code P2318 in a Volkswagen related to Ignition Coil 7 Primary Control Circuit Low?

In some cases, the Check Engine Light may turn off after a few successful drive cycles once the issue is resolved. If it does not, you may need to clear the fault code using an OBDII scanner.

9. How can I prevent the OBDII code P2318 related to Ignition Coil 7 Primary Control Circuit Low from occurring in my Volkswagen?

Regular maintenance, such as inspecting and replacing ignition components as needed, ensuring proper electrical connections, and addressing any engine performance issues promptly, can help prevent this code from appearing.

10. What is the typical cost to repair the OBDII code P2318 related to Ignition Coil 7 Primary Control Circuit Low in a Volkswagen?

The cost of repair can vary depending on the root cause of the issue, the labor rates in your area, and whether you choose to repair it yourself or seek professional help. It's recommended to obtain quotes from different sources for an accurate estimate.

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