Inspection/Maintenance System DTCS: Description

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

Catalyst System 

• P0420 Or P0430 - Catalyst System Low Efficiency

EGR System 

• P0401- EGR Flow Insufficient
• P0402 - EGR Flow Excessive

EVAP System 

• P0442 - EVAP System Small Leak Detected
• P0444 - EVAP Purge Valve Control Circuit - Low Voltage
• P0445 - EVAP Purge Valve Control Circuit - High Voltage
• P0447 - EVAP Vent Valve Control Circuit - Low Voltage
• P0448 - EVAP Vent Valve Control Circuit - High Voltage
• P0455 - EVAP System Leak
• P0496 - EVAP System Flow During Non-Purge

Oxygen Sensor System 

• P0131 Or P0151 - HO2S Circuit - Low Voltage (Sensor 1)
• P0132 Or P0152 - HO2S Circuit - High Voltage (Sensor 1)
• P0133 Or P0153 - HO2S Slow Response (Sensor 1)
• P0134 Or P0152 - HO2S Insufficient Activity (Sensor 1)
• P0137 Or P0157 - HO2S Circuit - Low Voltage (Sensor 2)
• P0138 Or P0158 - HO2S Circuit - High Voltage (Sensor 2)
• P1132 - HO2S Signal Circuit Shorted To Heater Circuit (Bank 1; Sensor 1)
• P1152 - HO2S Signal Circuit Shorted To Heater Circuit (Bank 2; Sensor 1)

Oxygen Sensor Heater System 

• P0135 Or P0155 - HO2S Heater Performance (Sensor 1)
• P0141 - HO2S Heater Performance (Bank 1; Sensor 2)
• P0161 - HO2S Heater Performance (Bank 2; Sensor 2)

Diagnose affected DTCs. See DIAGNOSTIC TROUBLE CODE DEFINITIONS  .