Anyone have one?
Things are getting tight..almost 6 months, which means impoundment.
What a f'd up system. You must drive the car to set the Readiness indicators, but
if takes a while to get everything fixed, you risk losing the car.
Catalyst won't go ready. Spent hours on the phone with CARB
BAR, DMV, repair shops, and Mercedes customer care.
They sent me this...attached, but it says only till 1999.
Last ditch effort, ordered a new Cat. Aftermarket ones don't seem to last long anyway,
and at one point I had a pending P0420 code, so wtf. $200 is better than paying the
dealer to drive the car around at $230 an hour, which is what the Smog refs says I should do,
give to the dealer! Are you f'ing kidding? All this for one readiness indicator not set.
I love the beauty of Cali and the weather but *** their politics and Jerry Brown.
After this I'm registering it in a non-smog county and voting republican.
*** this.

 

I agree that if your car isn't showing a completed cycle by now, something is likely wrong.
Besides changing the cat, I suggest changing the primary O2 sensor.

Otherwise, maybe an independent is an option?

Good luck.

 

Try this. But something must be wrong with your car. I don't even have to do the cycle. It just clears itself after a few miles.

 

I'm getting these codes in Torque
and also with Icarsoft, but nothing in OBD

P201D: Unknown code - More information may be available on the web
P203A: Unknown code - More information may be available on the web
P203B: Unknown code - More information may be available on the web

 

I wouldn't be surprised if one/all of those codes are effecting the I/M test from being run.
I'm sure you did your own Google search.
From my quick Google search:

https://mbworld.org/forums/c-class-w...00b-p201d.html
=====
P201D Selfadaptation of mixture formation, Mixture is too rich at idle speed.[P0172]

-Check prerequistites
>Lambda control enabled
>Function of self adaptation of mixture formation enabled
>Coolant temperature higher than 75'c
>No engine oil dilution due to fuel

*In order to determine a new value for the mixture formation self-adaptation, it is necessary to undertake a journey of approx 30 minutes with lambda control enabled. The coolant temperature must be less than 60'c during start.
=====

https://mbworld.org/forums/clk-class...03a-p201c.html

https://www.benzworld.org/forums/w20...p-warning.html


Also, if/when you replace the cat, replace the secondary O2 sensor. As O2 sensors get old/used, their response starts to slow down a lot, and they read lean (making the car run richer). The former may be an issue if the ECM is purposely running the engine st rich/lean for a short time to see the secondary O2 sensor react.

Also, the other thing that may make sense is if the engine passes/fails the tests, then changes. That means that the I?M test would go between pass<->not_ready, or fail<->not_ready. So, the engine/system might be right on the edge of passing or failing.

Good Luck!

 

So I'm making some progress, After deep consideration on the best path (pay for a diagnostic from a smog shop $200, or take to my mechanic and spend god knows how much or..?), I decided that more than likely the Cat needed replacement.

I could spend endless amounts of money and time just paying someone to come to that conclusion for me, or just order the replacement from Ebay for $160 and pay 60 to get it welded on.
One mechanic had said to me on several occasions, failing to run the monitor is in itself a fail and in this
case it's going to be the Cat or the 02 sensors. Since the sensors are new within a couple K miles and the MAF as well, that leaves the Cat.
I did at one point get a pending P0420 but tried to cheat the computer by using
a spacer, a trick I found online. While ultimately after trying it and removing 2 of the 3 pieces included in the kit, after they caused CEL's for the 02 sensor not being uh...like sensitive enough or something of that nature.
So I eventually achieved the result of not throwing any codes, it still refused to run the monitor.
So Fark it. At least with a new Cat I don't have to wonder if it's bad, or pay someone the total cost of replacement
just to tell me to replace it.

Additionally, it seemed the Bosch recirculating air valve I installed back in Jan of this year failed.
Frequently on start up it failed to work, running around on 1/2 power from no boost,
usually kicking in after a while or after a restart after it warmed up.
Doing the re-learning in process didn't fix it.

After reading the codes on my high priced iCarsoft piece of crap, that lists codes, but provides no way to print them, or network connectivity or even a way to save the report, my $150 iCarsoft informed of the same codes that Torque found and also said it had no idea what they were.
Back to the drawing board so to speak, or rather my old Carsoft 7.2 serial interface.
It correctly pointed out the recirculating air valve had problems, but also now was telling me the car was
running too rich post new Cat install. Huh?
Here's the report. Much more useful than the other...though it refuses to connect to many of
the modules, but fortunately it connected to the ME.

So any errors at all will prevent the monitors from running,
is what you learn when you spend as much time I as I have learning about this.
I contacted the vendor for the Bosch recirculating air valve, got another one, lifetime warranty it seems.

Got the part installed it and headed out for a weekend jaunt to Big Sur, and down to San Simeon to
hopefully complete that last damn monitor!
Well....
So, I forgot to connect one of the hoses, and it it threw a CEL for too lean.
Oddly, the OBD code is P0171 too lean, but Carsoft says it's too rich!

So here's the real key.
I reconnected the loose hose, reset the CEL and
therefore all the monitors, and drove back.
Plus a trip up the Peninsula last night for dinner, and Eureka!
The Catalyst monitor is COMPLETE!!!

Now that only leaves the Evap and the Secondary Air injection to complete.
A Scan shows NO ERRORS at all! Sweet.

Here's what needed for the Evap and Secondary Air injection to complete.
6. Air Injection Diagnostics: (do not interrupt this test when performing this test step 6).Note:First: Place a suitable auxiliary fan in front of the vehicle to force engine cool down. (Engine cool down can also be simulated by using a decade box to simulate engine cool down). Continue test step: With engine temperature less than 40 degrees C, the air conditioning OFF and the transmission gearshift lever in Park position; and auxiliary fan removed from front of vehicle,• Start engine and accelerate engine speed to 1400 rpm.• Allow engine to run at this increased rpm until coolant temperature reaches between 70 to106 degrees C.• Allow engine to run with increased rpms for 7 minutes (or drive the vehicle for 7 minutes).• After the 7 minute time period has been reached, stop the vehicle, place gearshift lever into Park position and allow engine to idle (with no load) for 6 seconds. Do not use A/C.• After this step turn the ignition OFF, wait ten seconds and repeat this test step.• Note that when testing the air injection system, the engine coolant temperature must be atS-B-14.00/17a May 2011 5the same temperature (degrees) as when before the ignition key was switched off in the prior test step.Note:If using a Hand-Held Scan Tool to verify Step 6 test completion. This will be indicated by a check mark inthe display field or the word PASS 7. Fuel System Leak test (EVAP): No DTC codes should be present in memory for the EVAP canister purge valve, fuel tank pressure sensor, or the shut-off valve.Note:Prior to performing this test (7) step:• Ensure the fuel tank fuel level is between ¼ and ¾ full and• The engine temperature less than 100 degrees C with air intake temperature less than 45degrees C.• With gearshift lever in Park position, start and idle engine for 20 minutes (with no load).Note that if after the 20 minutes of idling time has elapsed and no readiness codes were set, consider driving the vehicle for an additional 20 minutes.• After these 20 minutes has elapsed, turn ignition OFF, wait 10 seconds and repeat this test
step again.

MORAL OF THE STORY!-
If you make mechanical changes mid stride into trying to get the monitors to run, clear them
completely and start over. This apparently resets the engine adaptations, and they start over.
Incidentally the old 7.2 has a function for clearing adaptions. I haven't tried it out yet.

Now just waiting for the engine to get cold to run the last 2 tests, pass smog, get my tags and register the car in another county that doesn't require smog, and never ever go through this shiiit again.

 

That's great that you got the test(s) to complete and can get your emissions sticker.
Congratulations!

>order the replacement from Ebay for $160 and pay 60 to get it welded on.
So, you removed the header and cat assembly, cut the old cat out from the assembly, took the assembly and the new cat to a welder, and the welder put on the new cat?
That's a decent amount of time and effort on your part.
I surprised that you didn't just replace the whole assembly. Maybe, a Calf/CARB approved header and cat assembly are $$$.


Congrats again on finding the problems and correcting them all!

 

RedGray, Header came out a while ago, sold to uh...can't think of his name...
guy in Canada with 3 02 C Coupes, 2 of which I think are Citron.
Put it back to stock on the exhaust. Was too damn noisy!

So, no, just bought a Cat (Walker 82629) Calif compatible.
Took a muffler shop and welded in. No removing anything from the car.

Just sat in the car for like 1/2 hour doing the Secondary air injection thing, 7 minutes at X temp at 1400 rpm + repeat, but it didn't
go. Crap. Thats the only thing in my way. Maybe it's too hot out.
Intake temp is mentioned in the Evap test but not in the Secondary air injection but at some
point it went above 45 C so...

 

I was soo close. Just needed secondary air injection.
Did the suggested idle at 1400 rpm and got a P0171 on Torque but shows
P0172 when I use the old CS 7.4 AND it says the catalyst is inefficient. Damn, it's NEW.
Left it sitting for a few days...back at it today.
Used CS 7.4's feature to erase adaptations, and errors, AND disconnected the battery for
a while to really clear everything and start from scratch.

The only I can think is either a. putting a new cat and Recirc valve put some new flys into the ointment,
and with the current engine adaptations, threw the car for a loop.
That being said I started seeing codes on Torque right after i left the muffler shop so maybe he
nicked the o2 sensor and f'd it up, because they are both new as is the MAF. Though the MAF is Bremi...and
well, maybe I need to get the good one.
If this doesn't work, having mechanic take a look.

I have a fukin headache... migrane. .Arrgh.

 

Replaced Cat and Recirc air valve, covered under Bosch lifetime warranty.
Threw all kind of codes after that, disconnected the battery to clear the engine adaptations, (also in CS 7.4, clear engine adapations)
and started fresh, still threw various codes, cleared them until it finally settled in with the new parts, and
re-adapted, then after a lot of driving, including a trip to fresno and back, it finally cleared and I got my tags.

Discovered how to pass Secondary air injection, not as shown in the drive cycle provided to me by Mercedes,
but to simply start driving immediately after cold start, cleared right away.
Usually I wait to warm up but that won't do it. Cold start is the only time it's engaged to so makes sense.
Makes a hell of a racket till the valve closes.

 

That's good news!
Congrats on getting the car to pass smog!

Thanks for the info on secondary air test.