P0357 Fault Code

Ignition Coil G Primary/Secondary Circuit Malfunction

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0357 fault code indicates that there is a malfunction in the ignition coil G primary/secondary circuit. This can lead to performance issues as the ignition coil is critical for providing the spark needed to ignite the air-fuel mixture in the engine cylinders.

What are the symptoms of the P0357 code?

Common symptoms associated with a P0357 code include:

• Engine misfires or rough running
• Reduced engine performance and acceleration
• Increased fuel consumption
• Illuminated check engine light
• Potential engine stalling

What causes the P0357 code?

Several factors can trigger this fault code, including:

• Faulty ignition coil G
• Damaged wiring or connectors in the ignition system
• A short or open circuit in the primary or secondary winding of the ignition coil
• Issues with the Engine Control Module (ECM)
• Faulty spark plugs or ignition coil boots

How to fix P0357?

To resolve a P0357 fault code, consider the following steps:

1. Inspect the ignition coil G and its wiring for any visible damage.
2. Use a multimeter to test the resistance of the ignition coil.
3. Check for loose or corroded connectors in the ignition system.
4. Replace the faulty ignition coil if tests indicate it is malfunctioning.
5. Clear the code and take the vehicle for a test drive to ensure the issue is resolved.