Cat temperature?

2014 CHEVROLET SILVERADO
140,000 MILES • 5.3L • V8 • 2WD • AUTOMATIC
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DONNIE H
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  • 1 POST
Truck running with small miss. I checked cat temperature upstream bank 1 256 degrees downstream 420 degrees bank 2 upstream 242 degrees downstream 452 degrees, is this good or bad?
Jun 14, 2023 at 10:20 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,246 POSTS
The temperature outside is usually between 30 and 100 degrees hotter. You are a little beyond that point, but I don't feel it is that far out. What is happening that caused you to check the converters?

Also, take a look at this link, you may find it helpful:

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

Let me know.

Joe
Jun 15, 2023 at 4:47 PM
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