Your 2022 Mitsubishi Outlander Sport's check engine light comes on and you feel a distinct vibration through the steering wheel and seats. A scan reveals P0302—Cylinder 2 Misfire Detected. This specific code tells you exactly which cylinder is struggling, making diagnosis more straightforward than random misfire codes. Here's how to track down and fix the problem.
Symptoms Accompanying P0302
- Check engine light illuminated (may flash if severe)
- Vibration felt at idle and during acceleration
- Rough idle that may smooth at higher RPM
- Hesitation during acceleration
- Possible reduction in fuel economy
- Engine may stumble or nearly stall
- Exhaust may have unusual odor
Understanding P0302
P0302 specifically identifies cylinder 2 as the misfiring cylinder. The engine computer detects misfires by monitoring crankshaft speed variations—when a cylinder doesn't fire properly, the crankshaft momentarily slows. Knowing which cylinder is affected allows targeted diagnosis instead of checking all cylinders.
Common Causes of P0302 in the Outlander Sport
Ignition Coil Failure
Coil-on-plug ignition systems place individual coils directly on each spark plug. The cylinder 2 coil can fail due to heat, age, or manufacturing defects.
Diagnostic method: Swap the cylinder 2 coil with another cylinder. If the misfire moves to the new location, the coil is bad.
Spark Plug Problems
Worn, fouled, or improperly gapped spark plugs can't ignite the fuel-air mixture reliably.
Diagnostic method: Remove and inspect the cylinder 2 spark plug. Compare to other cylinders and check for fouling, wear, or damage.
Fuel Injector Malfunction
A clogged or electrically failed injector prevents proper fuel delivery to cylinder 2.
Diagnostic method: Test injector electrically with noid light; consider professional flow testing.
Compression Loss
Mechanical issues—worn valve, burned valve, damaged head gasket, or piston ring problems—can cause low compression in cylinder 2.
Diagnostic method: Compression test cylinder 2 and compare to other cylinders.
Vacuum Leak Near Cylinder 2
An intake manifold gasket leak or cracked vacuum hose near cylinder 2 can cause a lean misfire in that cylinder specifically.
Diagnostic method: Use propane enrichment or smoke test to find leaks near cylinder 2.
Diagnosis Steps
- Verify the code: Confirm P0302 is stored and check for additional codes
- Swap ignition coil: Move cylinder 2 coil to cylinder 1 or 3, clear codes, drive
- Monitor results: If misfire follows the coil, replace it
- Inspect spark plug: Remove cylinder 2 plug, check condition and gap
- Test fuel injector: Verify electrical pulse and operation
- Compression test: If ignition and fuel check out, test compression
- Check for vacuum leaks: Focus on intake areas near cylinder 2
Repair Costs
- Ignition coil replacement: $150-$300
- Spark plug set: $80-$180
- Fuel injector replacement: $200-$400
- Fuel injector cleaning: $100-$200
- Vacuum leak repair: $100-$400
- Compression diagnosis: $100-$200
- Valve or head gasket repair: $800-$2,500
The 2022 Outlander Sport is covered by Mitsubishi's 5-year/60,000-mile warranty. Ignition component failures within this period should be covered.