2006 hummer h3 codes

[nosral1221]

I am new to the forum and have been having some issues with my 2006 Hummer H3. I am getting codes P0315 and P0335 which have to do with my crankshaft sensor. I have just replaced the crankshaft sensor and my buddy went through relearn process and the codes will not go away and my hummer stills runs a little rough. Could it be just a bad new sensor or something bigger.

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[CaddyStrophic]

I had an 06 and I found online that the heads go bad quite often. Luckily for me, it was just the coil packs, though.

You might want to do a compression test and see if everything is OK. (Also, I'm not a mechanic, just throwing my 2 cents in.)

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[napalmsticks]

Clean your MAF sensor, throttle body, and run a can of techron through your tank first. Also look for vaccum leaks. If it ends up being the head you will need to do a leak down check to diagnose it.

 

[4speedfunk]

Check your battery cables, (especially the ground).