P0305 Fault Code

Cylinder 5 Misfire Detected

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

The P0305 fault code indicates that there's a misfire detected in cylinder 5 of the engine. This can lead to a variety of performance issues including rough idling, decreased fuel efficiency, and increased emissions. Understanding this code is crucial for effective troubleshooting and repair.

What are the symptoms of the P0305 code?

• Rough engine idle and poor acceleration.
• Decreased fuel economy.
• Check Engine Light (CEL) illuminated on the dashboard.
• Engine may shake or vibrate more than usual.
• Possible increase in exhaust emissions.

What causes the P0305 code?

• Faulty spark plug in cylinder 5.
• Bad ignition coil for cylinder 5.
• Fuel delivery issues, such as a clogged fuel injector.
• Vacuum leak affecting the air-fuel mixture.
• Mechanical issues such as a compression loss in the cylinder.

How to fix P0305?

• Inspect and replace the spark plug in cylinder 5 if necessary.
• Test and replace the ignition coil for cylinder 5 if it's defective.
• Clean or replace the fuel injector for cylinder 5 if it's clogged.
• Check for vacuum leaks and repair them as needed.
• Conduct a compression test to diagnose any mechanical issues.