Vent: I used to think those cheap universal OBD-II scanners were fine for diesels

After a 2022 Duramax with a weird injector pulse issue stumped my basic unit, I borrowed a buddy's Snap-on Zeus. The live data stream showed a fuel pressure deviation my scanner completely missed. What's your go-to scanner for modern diesel diagnostics?

3 comments

3 Comments

blake_owens12d ago

The 2022 L5P still only has three main engine controllers.

thompson.julia12d ago

Wait, you were trying to diagnose a 2022 Duramax with a basic scanner? That's like using a butter knife for brain surgery. Those new trucks have way too many computers for the cheap stuff to keep up. I'm not surprised it missed something that big.

evan_grant7012d ago

Disagree completely with the idea you need a pro scanner. My basic OBD-II reader has pulled codes and live data on my 2020 Powerstroke for years. It caught a bad sensor just fine last month. The problem might have been a fluke or a bad connection, not the tool. Julia's brain surgery comment is over the top, these are still just trucks. Spending thousands on a Zeus for occasional use is crazy when a $150 unit usually gets the job done.