P0492 Fault Code

Secondary Air Injection System (Bank 2)

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0492 fault code indicates a problem with the Secondary Air Injection System on Bank 2 of the engine. This system is designed to reduce emissions during cold starts by injecting air into the exhaust system, helping to burn excess fuel and lower harmful emissions. If this code appears, it means that the system is either not functioning properly or there is a fault detected within it.

What are the symptoms of the P0492 code?

You may notice several symptoms if your vehicle has a P0492 code:

• Illumination of the Check Engine Light on the dashboard
• Increased emissions during testing
• Possible rough idling or decreased performance during cold starts
• Unusual noises from the secondary air injection pump

What causes the P0492 code?

Common causes of the P0492 code include:

• Faulty air pump or air injection pump
• Blocked or leaking air injection hoses or ducts
• Malfunctioning check valves in the air system
• Failed or damaged electrical connections or wiring
• Faulty engine control module (ECM) or software issues

How to fix P0492?

To resolve the P0492 fault code, follow these steps:

• Inspect and test the secondary air injection pump for functionality.
• Check for any blockages or leaks in the air injection system hoses and replace as necessary.
• Ensure that all electrical connections are secure and free from corrosion.
• Replace any faulty check valves in the system.
• If the system appears to be functioning correctly, consider resetting the ECU and performing a driving cycle to see if the code returns.