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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

Fuse link substitute
05/27/2026 in the Technical Discussion Forum
Still see a few vehicles that use the fuse link wiring as needed. Is there a kind of slow blow fuse setup that could be substituted for a bad/burnt fuse link? Would make things somewhat easier. If the proper fuse link wire is available, what connector cou...
Was vin written in ECU in 2004?
05/21/2026 in the Technical Discussion Forum
I'm trying to figure out if my 04 Lexus is 300 has the vin stored in the ECU. Scanning with my Autel mx808 doesn't show a vin although it recognizes it as a Lexus. It asked me what year it is, and if I tell it the wrong year that seems not to bother it. I...
3.5 EGR valve
05/21/2026 in the Technical Discussion Forum
[Driveability: 06 Chrysler 300 Touring 3.5L] Customer asking about the P0406 code. Looks like EGR valve issues. Seems to be several ways to replace valve, Intake manifold removal... Wiper tray/cowl,wiper motor or from underneath the vehicle. Has anybody ...
Toyota oil filter
05/20/2026 in the Technical Discussion Forum
[Engine: 17 Toyota Sienna LE 3.5L] Plastic oil filter housing won't loosen. Tried everything short of busting it off with big hammer. Even tried freezing it with freon. Any suggestions? Thanks.
Instrument cluster/Lo speed LAN communication
05/14/2026 in the Technical Discussion Forum
[Electrical: 20 Chevrolet Trax LS 1.4L] Looking for help, more info, or more experienced minds on this 2020 Chevy Trax. How it all started/what's happened to this point: Has an aftermarket radio/sound system in it. The customer was getting a/c voltage ty...

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