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SNAPONTECH, Technician
Category: Car
Satisfied Customers: 3803
Experience:  2 year Associate in Applied Arts and Sciences Degree in Automotive Repair Technology
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2000 Chevy Astro: Check Engine light came..Van..catalytic converter

Customer Question

The "Check Engine" light came on my 2000 Chevy Astro 2 WD Van. My code analyzer states "Catalyst System Efficiency Below Threshold Bank 1". Is it my catalytic converter or is it a sensor?

Tim Foran
Submitted: 6 years ago.
Category: Car
Expert:  SNAPONTECH replied 6 years ago.


Welcome to Justanswer, My name is Danny I am here to help.


I am very positive its the catalytic convertor but this will make sure your not missing something simple.Check for engine misfire. Check fuel pressure regulator for a leak. Check for coolant consumption. Replace the catalytic converter.

Let me know if you have any questions. If this was helpful please take a moment to kindly press the green ACCEPT button in the lower right hand corner. Thanks in advance Danny