Engine Error
P0309
Cylinder 9 Misfire Detected
Severity
High
Symptoms
Engine misfire, check engine light flashing, lack of power
Common Causes
- Worn or fouled spark plug in Cylinder 9
- Defective ignition coil
- Clogged fuel injector
- Low engine compression
How to Fix
- 1 Replace spark plug for Cylinder 9
- 2 Test and replace ignition coil
- 3 Clean or replace fuel injector
- 4 Perform compression test
Estimated Repair Cost
USD
$100
–
$600
Spark plug and coil: 150 - 300; Injector: 300 - 600