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International Automotive Technicians Network

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

To Relearn or Not: TPMS with Pressure and Location Display
11/03/2026 in the Technical Discussion Forum
When direct TPMS was introduced, a small percentage of vehicles offered a driver display showing locations and pressures of all monitored wheels. The first generation systems required a relearn following tire rotation so that locations would be accurate. ...
Evap P1457 EVAP control system leakage (EVAP canister area)
11/03/2026 in the Technical Discussion Forum
[Driveability: 04 Honda S2000 2.2L] My tech found the following: While running evap system test system never gets into vacuum. Has good vacuum coming from purge valve. Blocked canister close valve and retested. Still no vacuum. There is evidence of fuel ...
Cracked Flexplate bad outcome
11/02/2026 in the Technical Discussion Forum
[PowerTrain: 17 Dodge Grand Caravan SE 3.6L] Had a hard lesson on a noisy cracked flex plate replacement fairly in depth repair. Installed flex plate, trim plate and fasteners as needed. Put back together and road test great nice and quiet all good. Test...
2012 Tundra codes P 2445 and 2447
11/02/2026 in the Technical Discussion Forum
2012 Tundra 4.6 engine Have codes P2447 and P2445 new blower fans new valves on engine wiring checks ok no broken or shorted wires. Valves on valve cover are Toyota parts blowers are aftermarket . Scan tool will not activate the blowers, tells me conditio...
Coolant - modern alum heads, cast iron SBC
10/30/2026 in the Technical Discussion Forum
What coolant would you use ? Trick Flow "double hump" heads, 1967 SBC block. I am leaning towards Zerex G05 (HOAT). My thoughts are alum heads with cast iron, pretty sure the radiator is copper. Appreciate any thoughts.

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