Why is my 01 Pontiac Grand Am gt v.6 check engine light on?

LADY4EVER

New member
My car Need a NY State Inspection . The auto shop change the following:
EGR Valve
CHANGE OIL
PCV VALVE
THERMOSTAT
filters
wires & plugs (Adelco)
After the above change only the left service engine light is on


Thanks much for your replies.
2 hours ago - 4 days left to answer.
Additional Details
This shop is a ny state inspection station. This well be the third time he will scan using the OBDII computer system
3 minutes ago

Advance auto code was 1404 before he installed the egr valve
 
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