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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

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...
2016 Volvo XC70 T5 2.0L Cylinder Identification Wrong?
02/03/2026 in the Technical Discussion Forum
[Engine: 16 Volvo XC70 T5 2.0L] Odd occurrence on this vehicle: Came in running poorly with a Misfire on Cylinder #2. Performed the typical diagnostics on it, swapped coil and plug to separate cylinders and miss stayed on 2. At that point, elected to run...
Coolant overflow hose fitting oring
02/02/2026 in the Technical Discussion Forum
[Engine: 12 Ford F-150 FX4 3.5L] The overflow/coolant recovery bottle has a larger hose that is considered a heater hose. It has a [...] plastic fitting that runs back to the heater. There is a clip and what I assume are some seals orings there. Ford doe...

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