Code Po604

2007 CHEVROLET UPLANDER
245,000 MILES • 3.9L • V6 • 2WD • AUTOMATIC
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SLLY1791
  • MEMBER
  • 2 POSTS
No crank, no start, starting disabled, reduced power. Code # P0604. Now showing service traction control. Did all four theft resets. Replaced battery cable ends, cleaned grounds, checked all fuses, checked all relays, changed oil.
Jun 23, 2017 at 11:30 AM
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MHPAUTOS
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 31,937 POSTS
P0604 : Control Module Random Access Memory
Faulty Power train Control Module (PCM)
PCM harness is open or shorted
PCM circuit poor electrical connection
PCM Programming

Clear code and re try if code resets, you may have to get a dealer to re flash the PCM and if this fails you my be requiring a new PCM.
Jun 25, 2017 at 12:44 AM