P0496

Technical Definition:

Evaporative Emission (EVAP) System High Purge Flow

Trouble Code: P0496
Address: 0x0496
System: Powertrain
Subsystem: Auxiliary Emission Controls
Technical Description:

Possible Causes:
  • Faulty purge or vent solenod/valve
  • Plugged EVAP canister
  • Failed EVAP / fuel pressure sensor
  • Poor electrical connection
  • Short electrical circuit condition(Hyundai, Isuzu)
  • Faulty canister purge valve
  • Blocked vapor canister
  • Faulty vent solenoid
  • Leaking EVAP system hose (Hyundai)
  • Faulty purge flow sensor (Kia, Mazda)

Possible Symptoms:

Evaporative Emission System Flow During Non-Purge

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty EVAP canister vent valve
– Faulty EVAP canister pruge valve
– Plugged EVAP canister condition
– Faulty EVAP pressure sensor

Specific Makes:

P0492

Technical Definition:

Secondary Air Injection System Insufficient Flow (Bank 2)

Trouble Code: P0492
Address: 0x0492
System: Powertrain
Subsystem: Auxiliary Emission Controls
Technical Description:

Possible Causes:

Possible Symptoms:

Secondary Air Injection System Insufficient Flow Bank 2

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Intake leak
– Damaged AIR system components
– Faulty AIR Solenoid Valve
– Faulty AIR system relay

Specific Makes:

P0491

Technical Definition:

Secondary Air Injection System Insufficient Flow (Bank 1)

Trouble Code: P0491
Address: 0x0491
System: Powertrain
Subsystem: Auxiliary Emission Controls
Technical Description:

Possible Causes:

Possible Symptoms:

Secondary Air Injection System Insufficient Flow Bank 1

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Intake leak
– Damaged AIR system components
– Faulty AIR Solenoid Valve
– Faulty AIR system relay

Specific Makes: