Possible causes

– Secondary Air Injection check valve bank 2
– Secondary Air Injection (AIR) pump electrical circuit fault
– Blocked Secondary Air Injection (AIR) system
– Faulty Secondary Air Injection (AIR) pump

When is the code detected?

The P1416 code is set when no O2 sensor voltage change is detected by the Engine Control Module (ECM).

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P1416 BUICK Description

During the Secondary Air Injection (AIR) system test the Engine Control Module (ECM) looks for a change in the O2 sensor voltage.

BUICK Technical Service Bulletins for P1416 code