Matching You with a Pre-Screened Smog Check Center You will Love
Free Online Smog Check Diagnosis
$500 Free Consumer Repair Assistance
Failed Emissions Test
How to Pass the Test
Who Else Wants To Pass the Smog Check
Which Type Should I Choose?
    Forum > General Smog Check > Question

Join the community and post your questions. Ask-A-Tech right now!

General Smog Check

Diesel Truck OBD II Monitor Smog Regulation and Incomplete Allowed

Hello, Where can I find the regulation regarding Number of incomplete monitors allowed to pass on diesel powered vehicle so I can show the smog check technician? The technician says my 2016 Ram diesel truck must have 100% pass ODB II, were as your website states “2007 and newer model year vehicles are allowed only an incomplete exhaust after-treatment system monitor (e.g., particulate filter, NOx/SCR treatment, catalyst, etc.)” which applies to my truck. If I have a copy of this regulation, I can show the technician and get my truck smoged and registration completed which was due last month. Thank you.


Hello Kevin. Sorry you're having trouble with your Dodge Ram's smog check. No documentation may sway your smog technician's decision to not test your diesel truck with incomplete monitors. You can still try however, and rather than using the SmogTips page which discusses number of incomplete emission monitors allowed for diesel vehicles, we'd recommend going straight to the source. Follow the link below to download California's Smog Check Reference Guide (updated as of Jan 2018).


See page seven (7) which explains the number of allowed monitors for diesel and gas engines. See if this will sway your smog technicians mind. If not, seek inspection from another facility or the state's smog check referee's office; which you may contact by calling (800) 622-7733.

This is our suggestion only if there is no underlying issue or special instruction for your Dodge Ram diesel truck which the smog check machine is prompting. In other words, if the technician is hooking up your truck to the OIS-DAD emission test unit and the test tool is advising all monitors need to be ready, then there may very well be a special circumstance specifically for your vehicle which the BAR has required.

posted by SmogTips Support

Related Dodge Ram questions and answers you might find useful:

Dodge Ram 2500 Diesel Monitors Not Ready by AT

Dodge Stratus Drive Cycle To Make Monitors Ready by Sateasha

Buying a 2005 to 2007 Dodge Ram 2500 or 3500 5.9L Diesel Pickup from Out of State by John

Dodge Ram Purchasing in Nevada then Registering it in California by Mark

2000 Dodge Ram Van 1500 Drive Cycle by Pedro