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2011 Chevrolet Other Dumb Question about Diagnostic Scanner

Tiny
THEHALLMARK
  • MEMBER
  • 2011 CHEVROLET
  • 1.2L
  • MANUAL
  • 35,000 MILES
A) This may sound dumb, but if there is no 'Check Engine' light or any other warning light ON, is there any use of a diagnostic scanner. If yes, could you provide an example of a problem that can be diagnosed with the scanner in the absence of fault code or check engine light?

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Thursday, August 20th, 2015 AT 6:57 AM

1 Reply

Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
Of course there is, assuming this is a professional level scan tool.

Codes are only a starting point. The data is far more of a tool to diagnose an issue and get an understanding to what is taking place in the system. A bidirectional tool can also be used to activate circuits for testing or performing learning functions.

Not having codes merely separates the DIYers from the pros.
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Thursday, August 20th, 2015 AT 7:25 AM

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