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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

Camry 2.5 timing gear question
11/05/2026 in the Technical Discussion Forum
[Engine: 11 Toyota Camry 2.5L] Please explain the purpose of having the intake cam gear unlocked when the bolt is torqued? What would be different if the gear was locked when the bolt is torqued? I just did a 2013 with the gear unlocked and it worked fin...
ADAS
11/05/2026 in the Technical Discussion Forum
[Electrical: 20 Honda Odyssey Touring 3.5L] We are getting 19 codes from our ADAS cameras and blind spot systems. This is the second time this week we've been unable to fix a car which is in our "wheel house" of cars we work on and fix. Has anyone else g...
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...

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