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P1298 and P1211
Trucks running okay, but the mileage is a little lower than normal and the power seems down a little, so I run a Buzz test on my OTC SPX Genesis. I got a P1298 and P1211.
I have a mostly stock truck. NAPA 6637 filter and Superchip programmer on economy tune.
What do you think could be kicking the code? I was going to test the pump pressure going down the road.