P0304 on CHRYSLER PACIFICA — Cylinder 4 Misfire Detected

Q: "What does P0304 mean on a CHRYSLER PACIFICA?"

"P0304 indicates: Cylinder 4 Misfire Detected. This is a ignition system code. 3 CHRYSLER PACIFICA owners have reported this to NHTSA."

Q: "What are the most common causes of P0304 on CHRYSLER PACIFICA?"

"Based on 3 NHTSA reports, the most commonly cited components are: Power Train,Engine, Power Train,Electrical System,Engine, Engine. These percentages are based on the component field in owner complaints."

Q: "Is P0304 serious on my CHRYSLER PACIFICA?"

"Of 3 NHTSA reports for this code on CHRYSLER PACIFICA, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my CHRYSLER PACIFICA shows P0304?"

"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 P0304 Means on Your CHRYSLER PACIFICA

P0304 is a diagnostic trouble code indicating: Cylinder 4 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.

3 CHRYSLER PACIFICA owners have reported this issue to NHTSA across model years 2018-2020. Most reports come from the 2018, 2020 model years.

Real CHRYSLER PACIFICA Owner Reports

Source: NHTSA Complaints Database

"Failed cylinder head (misfire p0304). Need to have engine rebuilt or replaced. Also had oil cooler failure, losing coolant and oil. 71k miles, just over the 60k power train warranty. Need dealer to help fix but they are booked for next 3 months."

— 2018 CHRYSLER PACIFICA owner · POWER TRAIN,ENGINE · Filed 10/04/2023

"Van started running slightly rough in the mornings if the engine was cold. CEL eventually came on with a P0304 DTC. I replaced the igntion coils and spark plugs since the van was right at 80,000 miles. Seem to run fine for a day after, then issues came back."

— 2018 CHRYSLER PACIFICA owner · POWER TRAIN,ELECTRICAL SYSTEM,ENGINE · Filed 09/12/2022

"While driving in suburban traffic vehicle engine began running rough and lost most power with about 58000 mi on the vehicle. Received check engine light and vehicle entered 'limp mode' with Turtle Icon displayed on screen."

— 2020 CHRYSLER PACIFICA owner · ENGINE · Filed 01/07/2026

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

📊 Complaint Trend by Model Year

2

'18

1

'20

Common Causes on CHRYSLER PACIFICA

Based on NHTSA complaint component analysis for this vehicle.

POWER TRAIN,ENGINE 33.3%

POWER TRAIN,ELECTRICAL SYSTEM,ENGINE 33.3%

ENGINE 33.3%

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 P0304 mean on a CHRYSLER PACIFICA? ▾

P0304 indicates: Cylinder 4 Misfire Detected. This is a ignition system code. 3 CHRYSLER PACIFICA owners have reported this to NHTSA.

What are the most common causes of P0304 on CHRYSLER PACIFICA? ▾

Based on 3 NHTSA reports, the most commonly cited components are: Power Train,Engine, Power Train,Electrical System,Engine, Engine. These percentages are based on the component field in owner complaints.

Is P0304 serious on my CHRYSLER PACIFICA? ▾

Of 3 NHTSA reports for this code on CHRYSLER PACIFICA, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my CHRYSLER PACIFICA shows P0304? ▾

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.