Just had a P0303 And check engine light today. This was after a fun drive in combat traffic going to DFW airport.
So far, this is the only engine error the Blue Cobalt (BC) has had issued since I became its new owner. After about 10-20 miles, and several starts, the check engine light went out.
This evening I connected a cheep ODB scanner and checked for errors. P0303 confirmed, @ 900 rpm 78F outside air temp 192F coolant temp. All other parameters seemed nominal.
As a reminder, this is an 08 LS now with 120k miles, 7k miles on new AC plugs, 100 miles on fresh air filters & oil & oil filter and the original OEM coils. I guess the BC needs the the memory cleared and watch it for a bit to see if ithe error returns.
BTW, still getting 34-35 mpg @ 65-75mph over 60mile driving legs.....I do like this fun little car.
And, it only used 1-2 cups of Mobile 1 oil during the past 7k miles
Last edited by 1966tbird; 09-11-2017 at 08:28 PM.