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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

weird
09/19/2026 in the Technical Discussion Forum
[PowerTrain: 13 Subaru Outback 2.5i 2.5L] So my son gave me this Outback w 117k on it and it had a slight timing chain noise One second on startup and only at idle when warm. After a run at speed it quieted down. Recently the noise has completely disappe...
Cummins 'choppy' off idle issue
09/09/2026 in the Technical Discussion Forum
[Driveability: 01 Dodge Ram 3500 5.9L] Guys: This Cummins had a Banks Power Pack system put on it many years ago, and has set for extended periods of time. The codes were drawn, no check engine light on, by Auto Zone for I don't have access to a DRB III...
Brake line block off tool kit needed - ABS Low Brake Pedal
09/08/2026 in the Technical Discussion Forum
We have run into several random low brake pedals caused by ABS modules. Mostly Fords here. We have at least 2 kits of block off plug tools, but we almost never have the proper size and thread that we need. Does any one know of a more inclusive kit or comb...
2014 Toyota Camry no A\C Driver's side
09/04/2026 in the Technical Discussion Forum
This vehicle is fully charged and single zone, but only outputs cold air on the right center and side vents. Of course Alldata has no information on the servos or blower box. I'm trying to find possible causes. There's only one servo for vent temperature ...
2005 dodge ram P3500
09/03/2026 in the Technical Discussion Forum
[Miscellaneous: 05 Dodge Ram 2500 ST 5.7L] Getting ready for a trip and just did a quick scan for any codes. BCM has a P3500 code and scan tool does not give a description. Says see service manual, and the manual I have does not list that code. No proble...

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