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Crank no start

Nicholas Dufresne

By Nicholas Dufresne
in Ask A GM Technician

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Nicholas Dufresne Enthusiast

Nicholas Dufresne

Posted
Posted

Hey I have a 2014 Silverado. Killed on me after filling up and I changed mass airflow sensor and it started back up with a weird idle. Lost oil pressure so I changed oil and oil pressure sensor and cam sensor and it ran but killed on oil pressure and wouldn’t start. Got code p0c6 so I changed high pressure pump and it started up and ran good but lost oil pressure when idling after 20 minutes and killed while driving and won’t start back up. Got codes P0016 p0068 p0c6 and p0101. Truck cranks wont start and changed the oil again. Whats next for me to do? 

Jsdirt Senior Enthusiast

Jsdirt

Posted
Posted (edited)

Why would you change the MAF without diagnosing that as a problem? Sounds like you've either introduced issues due to poor parts quality, disturbed some chaffed wiring, or, you were way off base in your assumptions and you've got internal engine problems.

 

From here, it's anyone's guess. First thing I'd do is make sure the OE MAF was actually bad, and check your connector & wiring to the MAF to see if any damage was done during the install.  I suspect that cam correlation code has something to do with the original problem - either the timing chain jumped, or a cam phaser failed.

 

At this stage it would've been cheaper for your to find a local shop to diagnose the issue, rather than fire the parts cannon at it.

 

And for anyone reading, and for future reference, it would be a HUGE help ... and get you a faster response ... if you would post the code meanings with the codes. We aren't all walking encyclopedias. There's too many codes today for anyone in this field to possibly memorize. 

Edited by Jsdirt
  • 5 weeks later...
silveradosid Senior Enthusiast

silveradosid

Posted
Posted

if you want to fix this yourself, you are probably going to have to get a better scanner. you have low fuel pressure codes that can be the pump in the tank or the hp pressure pump if the camshaft wasn't positioned correctly when installed. need to know what the fuel pressure is with just the key on. second is you have timing codes which could be caused by low oil pressure, which will also give you the air flow codes you are getting. even if you get it started the low oil pressure is going to kill the engine

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