Chevy Truck Service Engine Soon Light On?

J

Jim -

New member
I have a 1995 Chevy K1500 Pickup truck and the service engine light is on, with codes:
13 - Open Oxygen Sensor Circuit
34 - M.A.P. Sensor Circuit (Low Sig.)
44 - Oxygen Sensor Lean Exhaust Indicated

I was wondering if anyone had any suggesstions on what I should start off replacing / checking.

Thanks.
 
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