Engine Misfire
Code P0303
Cylinder 3 Misfire
Plain English Meaning:Cylinder 3 is misfiring causing engine imbalance
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Red: Stop Driving & Tow
Driving may cause serious damage
P0303 Symptoms
- •Rough idle hesitation power loss
Most Common Causes of P0303
1Spark plug failure coil issue injector fault
P0303 Repair Playbook
Required Mechanic Tests
A qualified shop should perform these tests before replacing any parts to ensure they aren't guessing:
Swap coil inspect plug compression test
Typical Fix Paths & Estimated Costs
Replace ignition components $100–$1200
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Parts for P0303 Repair
Common replacement parts for engine misfire codes. (Paid links)
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