Common Subaru OBD Codes
Subaru boxer engines frequently trigger catalytic converter and oxygen sensor codes. The horizontally opposed engine design can lead to head gasket issues causing coolant temperature and misfire codes. EVAP leaks are also common across the lineup.
Most Common Subaru Diagnostic Codes
Catalyst System Efficiency Below Threshold
Typical cost: $200 - $2500
System Too Lean (Bank 1)
Typical cost: $75 - $1200
Evaporative Emission Control System Leak Detected (Gross Leak)
Typical cost: $15 - $500
Evaporative Emission Control System Leak Detected (Small Leak)
Typical cost: $20 - $600
Cylinder 1 Misfire Detected
Typical cost: $50 - $1200
Cylinder 2 Misfire Detected
Typical cost: $50 - $1200
Cylinder 3 Misfire Detected
Typical cost: $50 - $2000
Cylinder 4 Misfire Detected
Typical cost: $50 - $1200
Coolant Thermostat Below Thermostat Regulating Temperature
Typical cost: $50 - $400
Oxygen Sensor Slow Response (Bank 1, Sensor 1)
Typical cost: $100 - $400
Popular Subaru Models
The codes listed above are commonly reported across these Subaru models. Actual codes may vary by model year and engine type.
Recent Subaru Recalls
1 Active Recall — 2026 Subaru Forester
The following NHTSA safety recalls have been issued for this vehicle. Contact your dealer to check if your vehicle is affected.
STRUCTURE:BODY:HATCHBACK/LIFTGATE:HINGE AND ATTACHMENTS
Subaru of America, Inc. (Subaru) is recalling certain 2026 Forester vehicles. These vehicles may have been manufactured with an incorrect and/or incorrectly oriented rear hatch support bracket which can detach without prior warning.
Remedy: Dealers will inspect the rear hatch support brackets and, if necessary, replace the stay and support bracket, free of charge. Owner notification letters were mailed January 29, 2026. Owners may contact Subaru customer service at 1-844-373-6614. Subaru's number for this recall is WRG-25. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on December 20, 2025.
Data provided by the National Highway Traffic Safety Administration (NHTSA).
Need to read your codes?
An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
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