4 Wheel Drive/SUVs: Re., auto parts store, air injection

Question
I have a 2001 Blazer i have a code that is coming up 418??

Answer
P0418 Secondary Air Injection System Relay "A" Circuit Malfunction

The secondary air system is part of the emissions system and will require repair soon as to not hurt fuel economy. This relay is exposed to water and malfunction. Check with the auto parts store or the dealer on location and price of part and just unplug the old and plug in the new.

Matt