2020 Silverado 1500 Duramax - 1st Check Engine Light!!! (Part 1)
Chad Ivan Chad Ivan
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 Published On Jan 17, 2021

2020 Chevrolet Silverado with 3.0l Duramax Diesel threw it's first check engine light this a couple of days ago and I have been looking into what the fault is and showing what you might see if you get a similar "Service Emissions System" fault....

I show what the driver information screen shows when the fault occurs and since this is a little bit intermittent at the moment I have video of when it clears up and then the next morning it's back again. I do clear the code and take a look at the data coming from the system via my EFILive unit just to see if I can capture the true fault. P20BB is the registered, now historical fault and I'm going to see how quickly the dealership can get me in since the fault could limit my speed to 65mph in only 175 miles....

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