Why wont it show any codes?

2000 PONTIAC MONTANA
30,000 MILES
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JOSHLCOOK
  • MEMBER
  • 1 POST
it hesitates when i am at a stoplight and start to take off i just had the engine replaced.
Mar 14, 2012 at 1:54 PM
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WRENCHTECH
  • ✓ASE Certified Mechanic
  • 20,761 POSTS
  • ASE Certified Mechanic
It doesn't show any because there aren't any. the computer isn't a magic "fix all". It merely records situations that it has been programmed to monitor. It's going to require some old fashioned manual troubleshooting by analyzing the sensor and scan tool data.
Mar 14, 2012 at 1:59 PM
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