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Automotive Technical Discussion Forum

Professional automotive forum for all types of vehicle repair discussion that does not fit into one of our more specific technical forums. Discussions include both OBD and OBD2, engine performance analysis, diagnostic best practices, service information, vehicle standards such as J1962, J1939, J2534, OBD2 modes (e.g. MODE$06), ignition and fuel system analysis, alternative propulsion (e.g. hybrid, electric, natural gas), and more. This forum is for experienced automotive repair professionals only, membership required.

Continue to the description of our next automotive discussion forum, the Technical Theory Forum.

Recent Automotive Discussions in the Automotive Technical Discussion Forum

oil cooler housing
02/09/2026 in the Technical Discussion Forum
[Engine: 17 Jeep Grand Cherokee Limited 3.6L] The oil cooler is leaking oil. OE is plastic There is an aftermarket make of aluminum. Anybody have experience using the aftermarket? It sounds like it should be better, but I am hesitant using anything with...
GM prom ID
02/09/2026 in the Technical Discussion Forum
Anyone have a link to a GM prom ID chart? I have one that I suspect may or may not have the wrong prom in it, but I can't find anything online. I'd like to rule it in or out. There's lots of links, but no substance when I go there. The prom ID shows as "8...
Kia Telluride cooling fan operation
02/07/2026 in the Technical Discussion Forum
[Engine: 21 Kia Telluride LX 3.8L] My daughter has a 2022 Telluride. She is in Florida and it has been unseasonally cold down here. The a/c is not being used and the vehicle is running at a normal temperature. When she shuts off the vehicle, the cooling ...
2012 Toyota Highlander 2.7 P0016
02/06/2026 in the Technical Discussion Forum
I've got a bit of a head scratcher. 2012 Toyota Highlander with the 2.7 (4 cyl) sets a P0016 after 10-20 miles. This code is for cam/crank correlation, specific to the intake cam. Intake vvt oil control valve already replaced at the dealer. A little start...
Modern engine durability
02/05/2026 in the Technical Discussion Forum
So, I suspect we have all seen greatly reduced engine durability from multiple manufacturers compared to engines from 20-25 years ago and previous. Personally, I think the cause of the problem is about 50/50 between the extended oil change intervals and t...

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