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Automotive Emissions Forum

Professional automotive forum for discussion of automotive emissions, on-board diagnostics (OBD2), and emissions testing programs around the world. The discussions often cover both the non-technical aspects (such as enforcement, automotive politics, and legal), as well as the technical aspects of emissions and emissions-related repairs, including the differences between vehicle certification and the various inspection and maintenance programs around the world. This forum is for experienced automotive repair professionals only, membership required.

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Recent Automotive Discussions in the Automotive Emissions Forum

Invalid Data Was Received Bar Ois
11/13/2019 in the Emissions Forum
We have this 99 dodge 2500 5.9 diesel. We did extensive repairs. Truck is now ready for smog. But we have this issue, OIS keeps giving me Invalid data was received from the vehicle. I can communicate with all the scan tools, read vin and all but this...
Check engine light
11/07/2019 in the Emissions Forum
[Driveability: 02 Hummer H1 6.5L] Hello everyone, The Hummer comes into the shop. Failed smog due to the SES light not illuminating. I found high resistance in the MIL control circuit from the ecm to the ipc. circuit 419. Using a scan tool the light does...
Replacement Cat
10/25/2019 in the Emissions Forum
[Driveability: 98 Ford Econoline Super Duty Custom 6.8L] Good Morning fellow techs, I have a 1998 Ford class C motorhome 6.8l 14,050 GVW non-OBDII. looking for a aftermarket cat. Its not listed in the ARB data Base. I've called ARB and they referred me t...
Toyota Forced Monitors
10/22/2019 in the Emissions Forum
Hi EmF,ers, Has anyone forced a monitor on a Toyota? If you have, what MY and model? I was reading on the NASTF site that it's listed as one of the features of Techstream. TIA,.
87 renix jeep fuel control only with scanner connected
10/16/2019 in the Emissions Forum
[Driveability: 87 Jeep Wrangler 4.2L] Hi this is actually tech Aaron Weaver.I haven't been here in awhile. Im hopeing somebody remembers what is indicated by no fuel control unless scanner is connected. Ive checked grounds by dipstick. Checked batt to bl...

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