P0306 on JEEP WRANGLER — Cylinder 6 Misfire Detected

Q: "What does P0306 mean on a JEEP WRANGLER?"

"P0306 indicates: Cylinder 6 Misfire Detected. This is a ignition system code. 6 JEEP WRANGLER owners have reported this to NHTSA."

Q: "What are the most common causes of P0306 on JEEP WRANGLER?"

"Based on 6 NHTSA reports, the most commonly cited components are: Engine, Engine,Fuel/Propulsion System, Power Train,Engine. These percentages are based on the component field in owner complaints."

Q: "Is P0306 serious on my JEEP WRANGLER?"

"Of 6 NHTSA reports for this code on JEEP WRANGLER, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my JEEP WRANGLER shows P0306?"

"1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare."

What P0306 Means on Your JEEP WRANGLER

P0306 is a diagnostic trouble code indicating: Cylinder 6 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.

6 JEEP WRANGLER owners have reported this issue to NHTSA across model years 2008-2018. Most reports come from the 2013, 2008 model years. The most commonly reported component is Engine (50.0% of reports).

Real JEEP WRANGLER Owner Reports

Source: NHTSA Complaints Database

"I started my 2008 jeep wrangler jk and immediately got a check engine light with an audible sound. the engine was running very rough and shaking. i turned off the engine and it seemed fine but the check engine light was still on. i have a obd2 diagnostic code reader and it showed the code p0306."

— 2008 JEEP WRANGLER owner · ENGINE,FUEL/PROPULSION SYSTEM · Filed 12/25/2012

"Vehicle is currently (dec 2012) at dealer having heads/valves replaced (10th day after waiting 10 days for parts), original report 9 nov: idling engine continues to be very rough, much rougher than when reported to dealer on november 9 2012, dealer did pcm reflash/update as stalling maneuver, after"

— 2012 JEEP WRANGLER owner · POWER TRAIN,ENGINE · Filed 11/02/2012

"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."

— 2013 JEEP WRANGLER owner · ENGINE · Filed 11/12/2018

"Mil is illuminated periodically for dtc p0306. low compression detected in cylinder 6."

— 2013 JEEP WRANGLER owner · ENGINE · Filed 10/31/2016

"The car began to idle roughly--it would rattle and shake just sitting at a red light. if i tried to just roll the vehicle slightly forward, it would stutter. check engine light came on, but the manual informs to wait a few drive cycles to see if it will just turn off."

— 2013 JEEP WRANGLER owner · ENGINE · Filed 12/02/2014

All reports filed by vehicle owners directly with the U.S. Department of Transportation.

📊 Complaint Trend by Model Year

1

'08

1

'12

3

'13

1

'18

Common Causes on JEEP WRANGLER

Based on NHTSA complaint component analysis for this vehicle.

ENGINE 50%

ENGINE,FUEL/PROPULSION SYSTEM 16.7%

POWER TRAIN,ENGINE 16.7%

POWER TRAIN,ENGINE,FUEL/PROPULSION SYSTEM 16.7%

What To Do Next

1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
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.
3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.

Frequently Asked Questions

What does P0306 mean on a JEEP WRANGLER? ▾

P0306 indicates: Cylinder 6 Misfire Detected. This is a ignition system code. 6 JEEP WRANGLER owners have reported this to NHTSA.

What are the most common causes of P0306 on JEEP WRANGLER? ▾

Based on 6 NHTSA reports, the most commonly cited components are: Engine, Engine,Fuel/Propulsion System, Power Train,Engine. These percentages are based on the component field in owner complaints.

Is P0306 serious on my JEEP WRANGLER? ▾

Of 6 NHTSA reports for this code on JEEP WRANGLER, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my JEEP WRANGLER shows P0306? ▾

1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare.