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Emissions and exhaust fault codes

Codes from the systems that control what leaves the tailpipe: catalytic converter, oxygen sensors, EGR, EVAP and the diesel particulate filter.

• P0135 Oxygen Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)
• P0401 Exhaust Gas Recirculation Flow Insufficient
• P0420 Catalyst System Efficiency Below Threshold (Bank 1)
• P0442 Evaporative Emission System Leak Detected (Small Leak)
• P0455 Evaporative Emission System Leak Detected (Gross Leak)
• P2002 Diesel Particulate Filter Efficiency Below Threshold (Bank 1)

All fault codes