2006 Chevy HHR what I need to replace

Tiny
ASNY1117
  • MEMBER
  • 2006 CHEVROLET HHR
  • 4 CYL
  • 2WD
  • MANUAL
  • 180,000 MILES
P0420 Catalyst System Efficiency Below Threshold (Bank 1)
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Saturday, August 22nd, 2009 AT 9:42 AM

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Tiny
BRIAN 1
  • MEMBER
Reprogram the ECM with the latest calibrations.
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Saturday, August 22nd, 2009 AT 11:10 AM

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