P0491

SAE VAG Description
P0491 16875 Secondary Air Injection System Insufficient Flow Bank 1

Secondary Air Injection (AIR) system
- Secondary Air Injection (AIR) pump motor and relay. Secondary Air Injection (Air) Pump Motor and Relay, Checking
- Secondary Air Injection (AIR) pump motor, checking. Secondary Air Injection (Air) Pump Motor V101, Checking
- Secondary Air Injection (AIR) system components, removing and installing.
- Secondary Air Injection (AIR) valve, checking. Secondary Air Injection (Air) Valve, Checking
- Secondary Air system, function. Description and Operation
- Secondary Air Injection (AIR) system checking for proper seal. Combination Valve For Secondary Air Injection (Air), Checking Function and Proper Seal

Note: Check activation of AIR pump relay, -J299, using electrical wiring diagram.