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Discussion Starter · #1 ·
I bought an OBDii USB connector with the OBDWIZ software. When I hook it up to my truck it reports two ECUs. One has 12 PIDs and the other has 8 PIDs.

When I hooked it to my friends 2006 it only reported one.

What do you think that the issue could be? How can I tell if I need a ECU update without paying the dealer $130?


I'm trying to find out my rail pressure.... Has anyone been able to get rail pressure out of OBD dongle?

My truck is an early 2003, 2500, mostly stock.

Thanks in Advance!

Any recommendations for a better OBD reader?
 
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