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ONEBADMK8

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Had the truck 11 years, have a leaking intake that kills #1 every 6 months or so (too lazy to swap it) so I am driving the other day and get code P0103 again NP i swapped plug and coil, no change. Injector is firing too then I get a chassis code C0303? Saying the PCM voltage is low? Never in my life have I had this code. Anyone else?
 

TomB985

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Good evening,

Without knowing what year your truck is, it's tough to say for sure. And just to clarify, you imply a misfire in cylinder one… So the mean P0103 or P0301?

P0103 is a MAF circuit failure, p0301 is a misfire on cylinder one.
 
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ONEBADMK8

ONEBADMK8

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TY for the reply. It was a stabbed wire for the injector. Someone stabbed it for voltage check and was corroded, all great now.
 
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