Common Toyota OBD Codes
Toyota vehicles are known for reliability, but commonly trigger catalytic converter and evaporative emission codes as they age. Oxygen sensor failures and misfires are also frequent, especially on higher-mileage Camrys and Corollas.
Most Common Toyota Diagnostic Codes
Catalyst System Efficiency Below Threshold
Typical cost: $200 - $2500
System Too Lean (Bank 1)
Typical cost: $75 - $1200
Catalyst System Efficiency Below Threshold (Bank 2)
Typical cost: $250 - $2500
Evaporative Emission Control System Vent Control Circuit Malfunction
Typical cost: $75 - $500
Oxygen Sensor Circuit Malfunction (Bank 1, Sensor 2)
Typical cost: $100 - $350
Oxygen Sensor Slow Response (Bank 1, Sensor 1)
Typical cost: $100 - $400
Random/Multiple Cylinder Misfire Detected
Typical cost: $100 - $2500
Cylinder 1 Misfire Detected
Typical cost: $50 - $1200
Evaporative Emission Control System Leak Detected (Small Leak)
Typical cost: $20 - $600
Evaporative Emission Control System Leak Detected (Gross Leak)
Typical cost: $15 - $500
Popular Toyota Models
The codes listed above are commonly reported across these Toyota models. Actual codes may vary by model year and engine type.
Recent Toyota Recalls
1 Active Recall — 2026 Toyota Corolla
The following NHTSA safety recalls have been issued for this vehicle. Contact your dealer to check if your vehicle is affected.
EXTERIOR LIGHTING:HEADLIGHTS
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2026 Corolla vehicles. The front headlights may have missing headlight aim markings, which can result in improperly aimed headlights during service. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, "Lamps, Reflective Devices, and Associated Equipment."
Remedy: Dealers will replace both front headlight assemblies, free of charge. Owner notification letters are expected to be mailed April 12, 2026. Owners may contact Toyota's customer service at 1-800-331-4331. Toyota's number for this recall is 26TA05.
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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