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This is absolutely infuriating me. To get my 2017 RR Sport TD6 through California's emissions testing, I need to put it through its paces. Except for one, I have successfully prepared all of the monitors. The Human CAT Scanner.
Do you have a tried-and-true method for fixing this?
Despite my best efforts, I still don't understand this. I have tried all four of the drive cycles (A–D) that are provided on the forums, but this one still won't test. To try and figure out this last monitor, I drove 200 miles today with 3/4 tank of petrol and no DTCs.
The Heater, as far as I can tell, improves emissions by warming up the CATs during cold start. That being the case, I suppose I should do this as a fresh start. The "not ready" message persists despite my attempts to use the air conditioner and rear defroster cold start procedures.
I have an Autel; are there any diagnostic procedures I can follow to verify the heater is functioning properly?
Would greatly appreciate any assistance!
Thank you ahead of time
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Failure to Prepare for Heated Catalyst (HCAT) in SMOG Test: Drive Cycle
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ELDORADO4TRUCK
- Posts: 44
- Joined: Mon Feb 02, 2026 8:59 pm
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ryan_sportage_gt
- Posts: 26
- Joined: Mon Feb 02, 2026 8:50 pm
If you're a California driver, you might find this information useful when you get your first smog check next year. This issue has been resolved with a software update. When you next visit the dealer, ask them to update things for you.
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ryan_sportage_gt
- Posts: 26
- Joined: Mon Feb 02, 2026 8:50 pm
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ELDORADO4TRUCK
- Posts: 44
- Joined: Mon Feb 02, 2026 8:59 pm
I appreciate you getting back to me. I see now that my scanner has the wrong monitor labelled; it's the Nox/SCR aftertreatment.
Based on my research, it appears that all you have to do is drive it until the screen clears. My guess is that it needs to execute two deNox and deSox processes.
Indeed, I perused the recall. If my assumption is incorrect, this would indicate that there is a software bug. Unfortunately, I am not yet prepared.
Based on my research, it appears that all you have to do is drive it until the screen clears. My guess is that it needs to execute two deNox and deSox processes.
Indeed, I perused the recall. If my assumption is incorrect, this would indicate that there is a software bug. Unfortunately, I am not yet prepared.
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ELDORADO4TRUCK
- Posts: 44
- Joined: Mon Feb 02, 2026 8:59 pm
Yes, I did recheck the recall. There is a contradictory statement on cali emissions that states it can prevent a not ready, so I ruled it out at first. However, it does say it would read N/A. Later today, I will meet with the dealer.
Your assistance is greatly appreciated.
Your assistance is greatly appreciated.