AutoCodes – Suzuki – P2318 Suzuki

P2318 Suzuki 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 Suzuki 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 2,929
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 Suzuki 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 Suzuki - Ignition Coil 7 Primary Control Circuit Low - AutoCodes.com
P2318 Suzuki Code - Ignition Coil 7 Primary Control Circuit Low

What are the Possible Causes of the DTC P2318 Suzuki?

  • 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 Suzuki?

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 Suzuki 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 Suzuki code?

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

Need Help with the Code?

Get the P2318 Suzuki 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 Suzuki Code

1. What are the common symptoms of OBDII code P2318 (Suzuki) related to the Ignition Coil 7 Primary Control Circuit Low?

Symptoms may include engine misfires, rough idling, loss of power, and illuminated check engine light.

2. What can cause the OBDII code P2318 (Suzuki) indicating Ignition Coil 7 Primary Control Circuit Low?

The code P2318 can be triggered by issues such as a faulty ignition coil, damaged wiring, poor electrical connection, or a problem with the engine control module.

3. How can I diagnose the OBDII code P2318 (Suzuki) for Ignition Coil 7 Primary Control Circuit Low?

Diagnosis involves using an OBDII scanner to retrieve the code, inspecting the ignition coil and associated wiring for damage, and testing the electrical connections for proper voltage and continuity.

4. Can a bad spark plug cause the OBDII code P2318 (Suzuki) to appear?

While a bad spark plug may contribute to ignition issues, the code P2318 specifically points to a problem with the Ignition Coil 7 Primary Control Circuit, so the focus should be on diagnosing the coil and related components.

5. What are the repair options for addressing OBDII code P2318 (Suzuki) related to Ignition Coil 7 Primary Control Circuit Low?

Repair options include replacing the faulty ignition coil, repairing damaged wiring or connections, and resetting the engine control module after the issue has been resolved.

6. Can driving with the OBDII code P2318 (Suzuki) present cause further damage to the vehicle?

Continuing to drive with this code active may lead to increased fuel consumption, engine performance issues, and potential damage to the catalytic converter, so it is best to address the underlying problem promptly.

7. Is it possible to reset the OBDII code P2318 (Suzuki) related to Ignition Coil 7 Primary Control Circuit Low without repairing the issue?

Resetting the code without fixing the problem will only temporarily turn off the check engine light. The underlying issue causing the code will persist and may worsen over time.

8. How much does it typically cost to repair OBDII code P2318 (Suzuki) for Ignition Coil 7 Primary Control Circuit Low?

The cost of repair can vary depending on the specific cause of the issue, but it may involve expenses such as parts replacement, labor costs, and diagnostic fees.

9. Can a DIY enthusiast fix the OBDII code P2318 (Suzuki) related to Ignition Coil 7 Primary Control Circuit Low?

While some DIY enthusiasts may have the skills to diagnose and replace an ignition coil, it is recommended to consult a professional mechanic for an accurate diagnosis and proper repair to avoid potential complications.

10. How often does the OBDII code P2318 (Suzuki) appear in vehicles, and is it a common issue?

The occurrence of this specific code can vary depending on the vehicle's make and model, but ignition coil-related problems are relatively common in automotive diagnostics, making it a known issue for some Suzuki models.

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