P2318 Code - Ignition Coil 'G' 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 'G', Ignition Coil 'G' harness is open or shorted, Ignition Coil 'G' 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 indicates Ignition Coil 'G' Primary Control Circuit Low.
- Common causes
- Common causes include Faulty Ignition Coil 'G', Ignition Coil 'G' harness is open or shorted, Ignition Coil 'G' 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.
Code P2318 Description
What are the Possible Causes of the DTC P2318?
- Faulty Ignition Coil 'G'
- Ignition Coil 'G' harness is open or shorted
- Ignition Coil 'G' circuit poor electrical connection
How to Fix the DTC P2318?
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 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 code?
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Information for Specific Makes
- P2318 Audi — Ignition Coil 7 Primary Control Circuit Low
- P2318 Buick — Ignition Coil 7 Control Circuit Low Voltage
- P2318 Cadillac — Ignition Coil 7 Control Circuit Low Voltage
- P2318 Chevrolet — Ignition Coil 7 Control Circuit Low Voltage
- P2318 Chrysler — Ignition Coil 'G' Primary Control Circuit Low
- P2318 Dodge — Ignition Coil 'G' Primary Control Circuit Low
- P2318 Ford — Ignition Coil 'G' Primary Control Circuit Low
- P2318 GMC — Ignition Coil 7 Control Circuit Low Voltage
- P2318 Jeep — Ignition Coil 'G' Primary Control Circuit Low
- P2318 Lincoln — Ignition Coil 'G' Primary Control Circuit Low
- P2318 Mercury — Ignition Coil 'G' Primary Control Circuit Low
- P2318 Suzuki — Ignition Coil 7 Primary Control Circuit Low
- P2318 Volkswagen — Ignition Coil 7 Primary Control Circuit Low
Frequently Asked Questions about P2318 Code
What does the OBDII code P2318 mean?
The OBDII code P2318 indicates a low voltage problem in the primary control circuit of ignition coil 'G', which may affect engine performance.
What are common symptoms of the P2318 code?
Common symptoms include rough idling, poor acceleration, decreased fuel efficiency, engine misfires, and a check engine light illuminated.
What causes the P2318 code to trigger?
Causes may include a faulty ignition coil, damaged wiring or connectors in the ignition circuit, a malfunctioning powertrain control module (PCM), or issues with the fuel system.
Can I drive my vehicle with the P2318 code?
While it may be possible to drive the vehicle, it's not recommended because it can lead to further engine damage and poor performance. It's best to address the issue as soon as possible.
How can I diagnose the P2318 code?
Start by visually inspecting the ignition coil and its wiring for damage. Use an OBDII scanner to read additional codes, and test the ignition coil's resistance and voltage with a multimeter.
What are potential repair solutions for the P2318 code?
Repair solutions may include replacing the faulty ignition coil, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the PCM if it's malfunctioning.
How can I prevent the P2318 code from recurring?
Regular maintenance, such as inspecting ignition components and replacing worn parts, can help prevent issues that may cause the P2318 code from recurring.
Is the P2318 code specific to certain vehicle makes or models?
While the P2318 code can be found in various vehicle makes and models, specific symptoms and solutions may vary, so it's essential to consult your vehicle's service manual for detailed information.
What should I do if I clear the P2318 code but it comes back?
If the code returns after clearing it, further diagnostics are necessary to identify the root cause, as the underlying issue has not been resolved.
Discuss the causes and fixes for P2318 OBDII Code
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