P0302
High SeverityCylinder 2 Misfire Detected
Ignition System
P0302 — Instant Answer
Cylinder 2 Misfire Detected
Severity: HIGH SEVERITY
Meaning: Cylinder 2 is misfiring.
Safe to drive? NO if CEL is flashing. YES with caution if solid, but repair this week.
Estimated repair cost: $20 - $500
Most common causes:
- 1. Bad spark plug (35-45% of cases)
- 2. Faulty ignition coil (35-45% of cases)
- 3. Bad injector (10-25% of cases)
- 4. Low compression (10-25% of cases)
Symptoms
- ⚠️Rough idle
- ⚠️Power loss
- ⚠️Check engine light
- ⚠️Vibration
Related Symptoms
Common Causes
How to Diagnose P0302
- 1Swap plug or coil to another cylinder to test
- 2Check injector
- 3Compression test if spark/fuel OK
OEM Procedures for P0302
P0302 affects the Spark Plug. Found 116 OEM service manual procedures.
1969-73 PEUGEOT 504 4 Cylinder - Spark Plug Tube Replacement
1969-73 PEUGEOT 504 4 Cylinder - Spark Plug Tube Replacement
1969-73 PEUGEOT 504 4 Cylinder - Spark Plug Tube Replacement
1969-73 PEUGEOT 504 4 Cylinder - Spark Plug Tube Replacement
1969-73 PEUGEOT 504 4 Cylinder - Spark Plug Tube Replacement
1969-73 PEUGEOT 504 4 Cylinder - Spark Plug Tube Replacement
1969-73 PEUGEOT 504 4 Cylinder - Spark Plug Tube Replacement
1969-73 PEUGEOT 504 4 Cylinder - Spark Plug Tube Replacement
Showing 8 of 116 procedures
OEM Diagnostic Flowchart
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Parts & Tools for This Job
Common parts shoppers buy for P0302 Cylinder 2 Misfire Detected.
Oxygen Sensor
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Spark Plugs
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Ignition Coils
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Mass Air Flow Sensor
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Fuel Injectors
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Engine Oil
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OBD2 scanner
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Check SpecificationsBattery tester
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Related Resources
Repair guides, symptom pages, and wiring diagrams related to P0302.
OEM Manual Evidence
Browse →Enhanced I-HDS Makes Troubleshooting Multiple DTCS Easier (B18100G) — 2013 Acura ILX Base, 2.0L Eng VIN 1 Service Manual ~ LEMON Manuals LE...
Enhanced I-HDS Makes Troubleshooting Multiple DTCS Easier (B18100G) — 2013 Acura ILX Base, 2.0L Eng VIN 1 Service Manual ~ LEMON Manuals LE...
Enhanced I-HDS Makes Troubleshooting Multiple DTCS Easier (B18100G) — 2013 Acura ILX Base, 2.0L Eng VIN 1 Service Manual ~ LEMON Manuals LE...
Enhanced I-HDS Makes Troubleshooting Multiple DTCS Easier (B18100G) — 2013 Acura ILX Base, 2.4L Eng VIN 2 Service Manual ~ LEMON Manuals LE...
Exact Repair Workflows
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Open the exact repair flow most commonly associated with P0302 on this vehicle.
Open the exact repair flow most commonly associated with P0302 on this vehicle.
Open the exact repair flow most commonly associated with P0302 on this vehicle.
Open the exact repair flow most commonly associated with P0302 on this vehicle.
Open the exact repair flow most commonly associated with P0302 on this vehicle.
Related Symptoms
Browse →Rough idle often traces back to ignition, air metering, vacuum leaks, or timing-related faults before it becomes a full misfire complaint.
A check-engine light is a graph entry point into code pages, symptom-specific diagnosis, and the exact repair categories most often associated with those failures.
Steering wheel shake, brake pedal pulsation, or front-end vibration under braking usually points to rotor, pad, or suspension-related brake issues.
Exact Vehicle Hubs
Browse →Open the exact vehicle hub for a repair workflow commonly associated with P0302.
Open the exact vehicle hub for a repair workflow commonly associated with P0302.
Open the exact vehicle hub for a repair workflow commonly associated with P0302.
Open the exact vehicle hub grounded by OEM manual evidence related to P0302.
Open the exact vehicle hub grounded by OEM manual evidence related to P0302.
Open the exact vehicle hub for a repair workflow commonly associated with P0302.
Related Codes
The engine is misfiring across multiple cylinders. This is often caused by something that affects all cylinders — spark plugs, fuel quality, vacuum leak, or low compression.
Cylinder 1 is misfiring — not firing properly. Could be spark plug, coil, injector, or compression issue on that specific cylinder.
Cylinder 3 is misfiring.
Frequently Asked Questions
- Is the diagnosis the same for all cylinder misfires?
- Yes — P0301 through P0308 are diagnosed the same way. Swap components to the affected cylinder to isolate the cause.
- What if the misfire does not follow the coil or plug?
- Then the issue is specific to the cylinder — check injector, compression, or valve timing on that cylinder.
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Author & Review
Published by AllOEMManuals, founded by Lyndon Bedford, an automotive technician with 20 years of experience. He owned and operated a mechanic shop in Hurst, Texas from 2014 to 2022 and continues hands-on repair work.
Content may combine manual references, general repair templates, and AI-assisted drafting. Confirm the source, vehicle configuration, and applicability before working. Report corrections through our contact page.
Last updated: 2026-10-29