P0492

2017-10-10

Description:

  • The fault code P0492 indicates that there is an issue with the Secondary Air Injection (SAI) system of the vehicle. Specifically, the system is not providing sufficient flow in Bank 2. This may cause the vehicle to run poorly or not start at all.

Possible Symptoms:

  • Illuminated check engine light

  • Reduced engine power or acceleration

  • Rough idle or stalling

  • Poor fuel economy

Possible Causes:

  • Damaged or failed air pump

  • Clogged or damaged air hoses

  • Faulty SAI control valve

  • Damaged or failed SAI bypass valve

  • Damaged or failed SAI system relay

  • Faulty oxygen (O2) sensor

  • Failed engine control module (ECM)

Related Parts:

  • Air Injector: Air is injected into the exhaust gases for better combustion of unburnt fuel and pollutants through air injectors. This allows for better exhaust emission. Problems lead to harmful emissions out of limit

Possible Solutions:

  • Replace the damaged or failed air pump

  • Check and repair any clogged or damaged air hoses

  • Replace the faulty SAI control valve

  • Replace the damaged or failed SAI bypass valve

  • Replace the damaged or failed SAI system relay

  • Replace the faulty oxygen (O2) sensor

  • Replace the engine control module (ECM) if necessary

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