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P0304 on SUBARU OUTBACK

Severity
Medium
NHTSA Reports
2
Most Affected
2006, 2012

What P0304 Means on Your SUBARU OUTBACK

Real SUBARU OUTBACK Owner Reports (Source: NHTSA Complaints Database)

"I have 2006 subaru out back sport wagon which is a basic subaru impreza wagon with dual paint. automatic transmission. while on road car begin to choke and check engine light and cruisecontrol light came on and start blinking."

— 2006 SUBARU OUTBACK owner • POWER TRAIN,ENGINE • Filed 05/20/2012

"The contact's girlfriend owns a 2012 Subaru Outback. The contact stated that the vehicle hesitated while starting. In addition, the contact attempted to jumpstart the vehicle; however, the vehicle failed to start. The check engine warning light was intermittently illuminated."

— 2012 SUBARU OUTBACK owner • ENGINE AND ENGINE COOLING,ELECTRICAL SYSTEM,AIR BAGS • Filed 06/15/2019

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 SUBARU OUTBACK

50%
50%

Percentages based on NHTSA complaint component analysis for this vehicle.

Complaint Trend by Year

2006
1
2012
1

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