P04xx — Auxiliary emission controls

256 codes in this range. Generic powertrain codes — engine, fuel, ignition, emissions and transmission.

• P0400Exhaust Gas Recirculation Flow Malfunction
• P0401Exhaust Gas Recirculation Flow Insufficient DetectedWorkshop notes included
• P0402Exhaust Gas Recirculation Flow Excessive Detected
• P0403EGR Control Circuit
• P0404EGR Range/Performance
• P0405Exhaust Gas Recirculation Sensor "A" Circuit Low
• P0406Exhaust Gas Recirculation Sensor "A" Circuit High
• P0407EGR Sensor B Circuit Low
• P0408Exhaust Gas Recirculation Sensor "B" Circuit Low
• P0409Exhaust Gas Recirculation Sensor "B" Circuit High
• P040AEGR Temperature Sensor A Circuit
• P040BEGR Temperature Sensor A Circuit Range/Performance
• P040CEGR Temperature Sensor A Circuit Low
• P040DEGR Temperature Sensor A Circuit High
• P040EEGR Temperature Sensor A Circuit Intermittent/Erratic
• P040FEGR Temperature Sensor A/B Correlation
• P0410Secondary Air Injection System Malfunction
• P0411Secondary Air Injection System Incorrect Flow
• P0412Secondary Air Injection System Switching Valve A Circuit
• P0413Secondary Air Injection System Switching Valve A Circuit Open
• P0414Secondary Air Injection System Switching Valve "A" Circuit Shorted
• P0415Secondary Air Injection System Switching Valve B Circuit
• P0416Secondary Air Injection System Switching Valve B Circuit Open
• P0417Secondary Air Injection System Switching Valve B Circuit Shorted
• P0418Secondary Air Injection System Relay "A" Circuit Malfunction
• P0419Secondary Air Injection System Control B Circuit
• P041AEGR Temperature Sensor B Circuit
• P041BEGR Temperature Sensor B Circuit Range/Performance
• P041CEGR Temperature Sensor B Circuit Low
• P041DEGR Temperature Sensor B Circuit High
• P041EEGR Temperature Sensor B Circuit Intermittent/Erratic
• P041FSecondary Air Injection System Switching Valve A Circuit Low
• P0420Catalyst System Efficiency Below Threshold (Bank 1)Workshop notes included
• P0421Warm Up Catalyst Efficiency Below Threshold (Bank 1)
• P0422Main Catalyst Efficiency Below Threshold (Bank 1)
• P0423Heated Catalyst Efficiency Below Threshold (Bank 1)
• P0424Heated Catalyst Temperature Below Threshold (Bank 1)
• P0425Catalyst Temperature Sensor (Bank 1, Sensor 1)
• P0426Catalyst Temperature Sensor Circuit Range/Performance (Bank 1 Sensor 1)
• P0427Catalyst Temperature Sensor Circuit Low (Bank 1 Sensor 1)
• P0428Catalyst Temperature Sensor Circuit High (Bank 1 Sensor 1)
• P0429Catalyst Heater Control Circuit/Open (Bank 1)
• P042ACatalyst Temperature Sensor Circuit (Bank 1 Sensor 2)
• P042BCatalyst Temperature Sensor Circuit Range/Performance (Bank 1 Sensor 2)
• P042CCatalyst Temperature Sensor Circuit Low (Bank 1 Sensor 2)
• P042DCatalyst Temperature Sensor Circuit High (Bank 1 Sensor 2)
• P042EEGR A Control Stuck Open
• P042FEGR A Control Stuck Closed
• P0430Catalyst System Efficiency Below Threshold (Bank 2)Workshop notes included
• P0431Warm Up Catalyst Efficiency Below Threshold (Bank 2)
• P0432Main Catalyst Efficiency Below Threshold (Bank 2)
• P0433Heated Catalyst Efficiency Below Threshold (Bank 2)
• P0434Heated Catalyst Temperature Below Threshold (Bank 2)
• P0435Catalyst Temperature Sensor Circuit (Bank 2 Sensor 1)
• P0436Catalyst Temperature Sensor Circuit Range/Performance (Bank 2 Sensor 1)
• P0437Catalyst Temperature Sensor Circuit Low (Bank 2 Sensor 1)
• P0438Catalyst Temperature Sensor Circuit High (Bank 2 Sensor 1)
• P0439Catalyst Heater Control Circuit/Open (Bank 2)
• P043ACatalyst Temperature Sensor Circuit (Bank 2 Sensor 2)
• P043BCatalyst Temperature Sensor Circuit Range/Performance (Bank 2 Sensor 2)
• P043CCatalyst Temperature Sensor Circuit Low (Bank 2 Sensor 2)
• P043DCatalyst Temperature Sensor Circuit High (Bank 2 Sensor 2)
• P043EEVAP System Leak Detection Reference Orifice Low Flow
• P043FEVAP System Leak Detection Reference Orifice High Flow
• P0440Evaporative Emission Control System Malfunction
• P0441Evaporative Emission System Incorrect Purge Flow
• P0442Evaporative Emission System Leak Detected (Small Leak)Workshop notes included
• P0443Evaporative Emission System Purge Control Valve Circuit
• P0444Evaporative Emission Purge Control Valve Circuit Open
• P0445Evaporative Emission System Purge Control Valve Circuit Shorted
• P0446Evaporative Emission Vent Control Circuit Malfunction
• P0447Evaporative Emission System Vent Control Circuit Open
• P0448EVAP System Vent Control Circuit Shorted
• P0449Evaporative Emission System Vent Valve/Solenoid Circuit Malfunction
• P044AEGR Sensor C Circuit
• P044BEGR Sensor C Circuit Range/Performance
• P044CEGR Sensor C Circuit Low
• P044DEGR Sensor C Circuit High
• P044EEGR Sensor C Circuit Intermittent/Erratic
• P044FSecondary Air Injection System Switching Valve A Circuit High
• P0450EVAP System Pressure Sensor/Switch A Circuit
• P0451Evaporative Emission System Pressure Sensor Range/Performance
• P0452Evaporative Emission System Pressure Sensor Low Input
• P0453Evaporative Emission System Pressure Sensor High Input
• P0454EVAP System Pressure Sensor/Switch A Circuit Intermittent
• P0455Evaporative Emission System Leak Detected (Large Leak)
• P0456Evaporative Emission System Leak Detected (Very Small Leak)Workshop notes included
• P0457Evaporative Emission System Leak Detected (Fuel Cap Loose/Off)
• P0458EVAP System Purge Control Valve A Circuit Low
• P0459EVAP System Purge Control Valve A Circuit High
• P045AEGR B Control Circuit
• P045BEGR B Control Circuit Range/Performance
• P045CEGR B Control Circuit Low
• P045DEGR B Control Circuit High
• P045EEGR B Control Stuck Open
• P045FEGR B Control Stuck Closed
• P0460Fuel Level Sensor A Circuit
• P0461Fuel Level Sensor A Circuit Range/Performance
• P0462Fuel Level Sensor A Circuit Low
• P0463Fuel Level Sensor A Circuit High
• P0464Fuel Level Sensor A Circuit Intermittent
• P0465EVAP Purge Flow Sensor Circuit
• P0466EVAP Purge Flow Sensor Circuit Range/Performance
• P0467EVAP Purge Flow Sensor Circuit Low
• P0468EVAP Purge Flow Sensor Circuit High
• P0469EVAP Purge Flow Sensor Circuit Intermittent
• P046ACatalyst Temperature Sensor 1/2 Correlation (Bank 1)
• P046BCatalyst Temperature Sensor 1/2 Correlation (Bank 2)
• P046CEGR Sensor A Circuit Range/Performance
• P046DEGR Sensor A Circuit Intermittent/Erratic
• P046EEGR Sensor B Circuit Range/Performance
• P046FEGR Sensor B Circuit Intermittent/Erratic
• P0470Exhaust Pressure Sensor A Circuit
• P0471Exhaust Pressure Sensor A Circuit Range/Performance
• P0472Exhaust Pressure Sensor A Circuit Low
• P0473Exhaust Pressure Sensor A Circuit High
• P0474Exhaust Pressure Sensor A Circuit Intermittent/Erratic
• P0475Exhaust Pressure Control Valve A
• P0476Exhaust Pressure Control Valve A Range/Performance
• P0477Exhaust Pressure Control Valve A Low
• P0478Exhaust Pressure Control Valve A High
• P0479Exhaust Pressure Control Valve A Intermittent
• P047AExhaust Pressure Sensor B Circuit
• P047BExhaust Pressure Sensor B Circuit Range/Performance
• P047CExhaust Pressure Sensor B Circuit Low
• P047DExhaust Pressure Sensor B Circuit High
• P047EExhaust Pressure Sensor B Circuit Intermittent/Erratic
• P047FExhaust Pressure Control Valve A Stuck Open
• P0480Cooling Fan 1 Control Circuit
• P0481Cooling Fan 2 Control Circuit
• P0482Cooling Fan 3 Control Circuit Malfunction
• P0483Cooling Fan Rationality Check
• P0484Cooling Fan Current Too High
• P0485Cooling Fan Power/Ground Circuit
• P0486EGR Sensor B Circuit
• P0487EGR Throttle Control Circuit A/Open
• P0488EGR Throttle Control Circuit A Range/Performance
• P0489EGR A Control Circuit Low
• P048AExhaust Pressure Control Valve A Stuck Closed
• P048BExhaust Pressure Control Valve A Position Sensor/Switch Circuit
• P048CExhaust Pressure Control Valve A Position Sensor/Switch Circuit Range/Performance
• P048DExhaust Pressure Control Valve A Position Sensor/Switch Circuit Low
• P048EExhaust Pressure Control Valve A Position Sensor/Switch Circuit High
• P048FExhaust Pressure Control Valve A Position Sensor/Switch Circuit Intermittent/Erratic
• P0490EGR A Control Circuit High
• P0491Secondary Air Injection System Insufficient Flow (Bank 1)
• P0492Secondary Air Injection System Insufficient Flow (Bank 2)
• P0493Fan Overspeed
• P0494Fan 1 Underspeed
• P0495Fan 1 Overspeed
• P0496Evaporative Emission System High Purge Flow
• P0497EVAP System Low Purge Flow
• P0498EVAP System Vent Valve Control Circuit Low
• P0499EVAP System Vent Valve Control Circuit High
• P049AEGR B Flow
• P049BEGR B Flow Insufficient Detected
• P049CEGR B Flow Excessive Detected
• P049DEGR A Control Position Exceeded Learning Limit
• P049EEGR B Control Position Exceeded Learning Limit
• P049FExhaust Pressure Control Valve B
• P04A0Exhaust Pressure Control Valve B Range or Performance
• P04A1Exhaust Pressure Control Valve B Low
• P04A2Exhaust Pressure Control Valve B High
• P04A3Exhaust Pressure Control Valve B Intermittent
• P04A4Exhaust Pressure Control Valve B Stuck Open
• P04A5Exhaust Pressure Control Valve B Stuck Closed
• P04A6Exhaust Pressure Control Valve B Position Sensor Circuit
• P04A7Exhaust Pressure Control Valve B Position Sensor Circuit Range or Performance
• P04A8Exhaust Pressure Control Valve B Position Sensor Circuit Low
• P04A9Exhaust Pressure Control Valve B Position Sensor Circuit High
• P04AAExhaust Pressure Control Valve B Position Sensor Circuit Intermittent or Erratic
• P04ABEVAP System Purge Control Valve B Circuit Open
• P04ACEVAP System Purge Control Valve B Circuit Low
• P04ADEVAP System Purge Control Valve B Circuit High
• P04AEEVAP System Purge Control Valve B Performance Stuck Open
• P04AFEVAP System Purge Control Valve B Stuck Closed
• P04B0Refueling Vapor Control Valve Circuit Open
• P04B1Refueling Vapor Control Valve Circuit Low
• P04B2Refueling Vapor Control Valve Circuit High
• P04B3Refueling Vapor Control Valve Performance Stuck Open
• P04B4Refueling Vapor Control Valve Stuck Closed
• P04B5Fuel Fill Door Stuck Open
• P04B6Fuel Fill Door Stuck Closed
• P04B7Fuel Fill Door Position Sensor Circuit Intermittent or Erratic
• P04B8Fuel Fill Door Position Sensor Circuit
• P04B9Fuel Fill Door Position Sensor Circuit Low
• P04BAFuel Fill Door Position Sensor Circuit High
• P04BBFuel Fill Door Lock Control Circuit Open
• P04BCFuel Fill Door Lock Control Range or Performance
• P04BDFuel Fill Door Lock Control Circuit Low
• P04BEFuel Fill Door Lock Control Circuit High
• P04BFFuel Fill Door Unlock Control Circuit Open
• P04C0Fuel Fill Door Unlock Control Range or Performance
• P04C1Fuel Fill Door Unlock Control Circuit Low
• P04C2Fuel Fill Door Unlock Control Circuit High
• P04C3Fuel Fill Door Lock Position Sensor Circuit
• P04C4Fuel Fill Door Lock Position Sensor Circuit Range or Performance
• P04C5Fuel Fill Door Lock Position Sensor Circuit Low
• P04C6Fuel Fill Door Lock Position Sensor Circuit High
• P04C7Fuel Fill Door Lock Position Sensor Circuit Intermittent or Erratic
• P04C8Fuel Fill Door Open Request Sensor or Switch Circuit
• P04C9Fuel Fill Door Open Request Performance Stuck Off
• P04CAFuel Fill Door Open Request Sensor or Switch Circuit Low
• P04CBFuel Fill Door Open Request Sensor or Switch Circuit High
• P04CCFuel Fill Door Open Request Sensor or Switch Circuit Intermittent or Erratic
• P04CDFuel Fill Door Open Request Sensor or Switch Stuck On
• P04CEEGR Temperature Sensor C Circuit
• P04CFEGR Temperature Sensor C Circuit Range or Performance
• P04D0EGR Temperature Sensor C Circuit Low
• P04D1EGR Temperature Sensor C Circuit High
• P04D2EGR Temperature Sensor C Circuit Intermittent or Erratic
• P04D3Exhaust Brake Input Circuit
• P04D4Exhaust Brake Input Circuit Range or Performance
• P04D5Exhaust Brake Input Circuit Low
• P04D6Exhaust Brake Input Circuit High
• P04D7Exhaust Brake Input Circuit Intermittent or Erratic
• P04D8Excessive Time To Enter Closed Loop EGR Control
• P04D9Closed Loop EGR Control At Limit Flow Too Low
• P04DAClosed Loop EGR Control At Limit Flow Too High
• P04DBCrankcase Ventilation System Disconnected
• P04DCFuel Fill Door Position Sensor Circuit Range or Performance
• P04DDCold Start EGR A Flow Insufficient Detected
• P04DECold Start EGR A Flow Excessive Detected
• P04DFEVAP System Purge Control Valve A Performance Stuck Open
• P04E0EVAP System Purge Control Valve A Stuck Closed
• P04E1Crankcase Ventilation Hose Connection Sensor Circuit
• P04E2Crankcase Ventilation Hose Connection Sensor Circuit Low
• P04E3Crankcase Ventilation Hose Connection Sensor Circuit High
• P04E4Crankcase Ventilation Hose Connection Sensor Circuit Intermittent or Erratic
• P04E5EGR Temperature Sensor D Circuit
• P04E6EGR Temperature Sensor D Circuit Range or Performance
• P04E7EGR Temperature Sensor D Circuit Low
• P04E8EGR Temperature Sensor D Circuit High
• P04E9EGR Temperature Sensor D Circuit Intermittent or Erratic
• P04EAEVAP System Small Leak Detected Fuel Tank Side
• P04EBEVAP System Small Leak Detected Fresh Air Side
• P04ECEVAP System Large Leak Detected Fuel Tank Side
• P04EDEVAP System Large Leak Detected Fresh Air Side
• P04EEEVAP System Very Small Leak Detected Fuel Tank Side
• P04EFEVAP System Very Small Leak Detected Fresh Air Side
• P04F0EVAP System High Load Purge Line A Performance
• P04F1EVAP System Purge Line Performance
• P04F2Catalyst Heater Supply Voltage Bank 1
• P04F3Catalyst Heater Supply Voltage Bank 2
• P04F4Catalyst Heater Circuit Low Bank 1
• P04F5Catalyst Heater Circuit Low Bank 2
• P04F6Catalyst Heater Circuit High Bank 1
• P04F7Catalyst Heater Circuit High Bank 2
• P04F8Catalyst Heater Circuit Intermittent Bank 1
• P04F9Catalyst Heater Circuit Intermittent Bank 2
• P04FAEGR A Control Temperature Too High
• P04FBCrankcase Ventilation Hose Connection Sensor Range or Performance
• P04FCCrankcase Ventilation System Performance
• P04FDEGR Actuator A Control Processor Performance
• P04FECatalyst Heater Circuit Performance Bank 1
• P04FFCatalyst Heater Circuit Performance Bank 2