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Discussion Starter · #1 ·
2004 Chevy Trailblazer LS 4.2lt vortex . 269,564 as of 10/12/2021.
Codes: P1071 ,P0405 ,P0902???
P0107 , P1060 , P0023,
U1064
U1000
Help . I'm very sad 馃槶



It goes into this mode out of nowhere . But if I pull over and switch the ignition off. It will crank back up fine, then it may or may not do it again .
 

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2002 Pewter ls with automatic trans. 4x2, gray cloth interior.
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I think P0023 is the VVT and is around $80 from a parts store. Can't say thats the cause but I'd at least inspect it, especially if it's original and with all those miles.
 

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2004 chevy trailblazer_lt
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Seems like you have a common thread among the codes
Reading Codes here > OBDII Codes Engine Light Definitions Diagnostic Repair | AutoCodes
Without firing the parts cannon i would look at the PCM and related connectors and harness`s for corrosion or damaged wiring causing a communication issue

Most read the following from that site >>
Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
 
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