Inspection/Maintenance System DTCS: Description

The following DTCs are required to set system status to YES:

AIR  - Secondary Air Injection (AIR) System

Catalyst System 

• P0420: Catalyst System - Low Efficiency.

EGR 

• DTC P0401: EGR Flow Insufficient
• DTC P0404: EGR Open Position Performance
• DTC P0405: EGR Position Sensor Circuit - Low Voltage
• DTC P1404: EGR Closed Position Performance

EVAP System 

• P0440: Evaporative Emission System
• P0442: Evaporative Emission Control System - Small Leak Detected
• P0446: EVAP Vent System Performance
• P1441: Evaporative Emission System Flow During Non-Purge

Oxygen Sensor 

• P0133: HO2S 1 - Slow Response
• P0140: HO2S 2 Circuit - Insufficient Activity
• P1133: HO2S 1 - Insufficient Switching
• P1134: HO2S 1 Transition Time Ratio

Oxygen Sensor Heater 

• P0135: HO2S 1 - Heater Performance
• P0141: HO2S 2 - Heater Performance

Diagnose affected DTCs. See DIAGNOSTIC TROUBLE CODE DEFINITIONS .