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P0304 on HONDA ACCORD

Severity
Medium
NHTSA Reports
16
Most Affected
2018, 2019, 2022

What P0304 Means on Your HONDA ACCORD

Real HONDA ACCORD Owner Reports (Source: NHTSA Complaints Database)

"On 4/5/19, my wife's honda pilot ex experienced severe engine problems on the road in fairview tn resulting in an inability to accelerate, hesitation when the gas pedal was depressed, and a flashing 'check engine' light."

— 2011 HONDA ACCORD owner • ENGINE • Filed 04/05/2019

"Driving on freeway went and applied foot to gas pedal and car goes into limp mode causing in ability to drive as there isnt any power and mil light starts to blink and or will set and if it sets the traction steering and tp light also come on."

— 2015 HONDA ACCORD owner • STEERING,UNKNOWN OR OTHER,ENGINE • Filed 01/10/2022

"I have a 2016 honda accord touring with 102k miles vin# [xxx] , on 09-03-2020 was driving south on i-295 to orange park fl with my grand daughter [xxx] and daughter [xxx] and before exit to collins rd, my vehicle check engine light came on flashing and my honda accord turn off while driving in the m"

— 2016 HONDA ACCORD owner • UNKNOWN OR OTHER,ENGINE,FUEL/PROPULSION SYSTEM • Filed 09/03/2020

"On 11/3/25 honda conducted the fuel injection recall fix. Prior to this, no warning lights were displayed on dash. 11/11/25 nine different warnings displayed on dashboard board. 11/13/25 at approximately 35mph the vehicle would not accelerate and the 9 warning notifications continued to flash."

— 2018 HONDA ACCORD owner • VEHICLE SPEED CONTROL,UNKNOWN OR OTHER • Filed 11/03/2025

"Car had 80 thousand no heating or oil problems has been maintained through Honda. Recall on fuel pump replaced. Car starts rough, took it in a diagnostic was done revealing a possible leak near 3 cylinder possibly head gasket. Code P0304 came up with all break light codes reading. No oil leak."

— 2018 HONDA ACCORD owner • ENGINE • Filed 09/15/2025

Data from NHTSA Vehicle Complaints Database. All reports are filed by vehicle owners directly with the U.S. Department of Transportation.

Common Causes of P0304 on HONDA ACCORD

31.2%
12.5%
6.2%
6.2%
6.2%

Percentages based on NHTSA complaint component analysis for this vehicle.

Complaint Trend by Year

2011
1
2015
1
2016
1
2018
8
2019
2
2020
1
2022
2

What To Do Next

  1. 1
    Check for recalls on YOUR VIN

    Go to nhtsa.gov/recalls and enter your VIN. Free repairs if your vehicle is covered.

  2. 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. 3
    Compare repair quotes

    Get 2-3 quotes. Dealer vs independent shop prices often differ 30-50% for the same repair.

P0304 on Other Vehicles

Data sourced from the National Highway Traffic Safety Administration (U.S. Department of Transportation) and the SAE J2012 OBD-II standard. Code definitions follow the SAE J2012 / ISO 15031-6 standard. Owner reports are filed directly with NHTSA by vehicle owners. This information is provided for educational purposes only and should not replace professional automotive diagnosis. Always consult a qualified mechanic for vehicle repair decisions.

Last updated: March 2026