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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

no communication with dad but communicates with any scanner
09/21/2017 in the Emissions Forum
[Driveability: 08 Mercedes-Benz CLK350 3.5L] hello every body out there,i have this Mercedes clk-350 at my shop for smog but not my machine or other stations they are not able do smog it because no communication issue , but you can communicate with car w...
Won't run CAT monitor, data anomaly
08/31/2017 in the Emissions Forum
[Driveability: 00 GMC Sierra 1500 SL 4.3L] Friends, Trying to help a shop with this truck that refuses to run the cat monitor. I observe this anomaly of a difference between enhanced data and generic. Here is generic on KOEO, engine relatively cool. [sca...
EGR and o2 heater monitors will not run
08/23/2017 in the Emissions Forum
Vehicle came in for a smog inspection. Monitors were not ran. Customer had disconnected battery to clear MIL because he thought he could "trick the computer". Had him drive it until MIL came back on. Had a code P0172- 1/1 fuel system rich. Ended up being ...
P0174
08/22/2017 in the Emissions Forum
[Driveability: 03 Ford E-350 Club Wagon XL 5.4L] Another strange one for the Ford guys out there... Vehicle comes into the shop with P0174 set, Bank 2 Lean. Hook up the IDS, and sure enough, the LTFTs on that bank are additive to the tune of +30%, more t...
Ford Readiness Issue
08/21/2017 in the Emissions Forum
[Driveability: 05 Ford Mustang 4.0L] Hi all, I'm having trouble getting CAT, O2 and O2 Heater monitors to run on this 4.0 V-6 Mustang. It is completely stock, not so much as an aftermarket air filter. 2 years ago it passed IEPA emissions testing with all...

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