P0302 on Jeep Wrangler
Cylinder 2 Misfire Detected
Methodology: Reviewed against the SAE J2012 generic DTC definition and NHTSA owner-complaint patterns, then scoped to Jeep Wrangler context without treating complaints as confirmed diagnoses.
Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).
- SAE J2012 Diagnostic Trouble Code Definitions — Generic diagnostic trouble code definition reference for P0302.
- NHTSA recalls, complaints, and manufacturer communications — Used to check public owner complaint context, recall status, and safety-related manufacturer communications by VIN or vehicle.
Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.
What P0302 Means on Your Jeep Wrangler
P0302 is a diagnostic trouble code indicating: Cylinder 2 Misfire Detected. This code relates to the ignition system system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.
Real Jeep Wrangler Owner Reports
Source: NHTSA Complaints Database
"On march 13, 2010, my 2005 jeep wrangler displayed a check engine light. the code was p0302. when cleared, the code did not return and the jeep ran normally until approximately march 26, when it went into a "limp mode" (rev limiter moved to 2500 rpm) after being revved to 4500 rpm."
"Check engine light came on, with a p0302 #2 cylinder misfire reading. after replacing consumable parts (spark plugs, engine coil) reset engine light, the code p0302 returned after 15-20 miles driving. this issue is a well know problem with the 3."
"Check engine light illuminated, resulting in p0302 #2 cylinder misfire. after replacing consumable parts (spark plug, engine coil) reset engine light. code returned after 20 miles driving. dealer technicians indicate issue is #2 cylinder head needs replacement."
"Really have 3 issues with this vehicle. the first is that the engine began to tick noticeably at around 5000 miles, sound definitely coming from #2 cylinder. was initially told not to worry, noise was normal, oddly it did not tick previously."
"P0302 misfire cylinder 2. p0300, p0304 & p0306 jeep/dodge is very aware of this cylinder issue and has a service bulletin for several models. (journey, wrangler, 200/avenger, challenger, charger, grand caravan, durango and grand cherokee). and they will not recall this part."
All reports filed by vehicle owners directly with the U.S. Department of Transportation.
📊 Complaint Trend by Model Year
Common Causes on Jeep Wrangler
Based on NHTSA complaint component analysis for this vehicle.
What To Do Next
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1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
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2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50–$150) pinpoints the root cause before you spend money on parts.
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3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.