[cdrinkh2o]

Awesome! What was the "leak" in the system?

It was the capless fuel filler mechanism which needed cleaning and lubing and then "jamming in and out like prom night" to seal properly.

 

[Proflyer]

It was the capless fuel filler mechanism which needed cleaning and lubing and then "jamming in and out like prom night" to seal properly.

YES!!!!!!!!!!!!!! [emoji1591][emoji1591][emoji1591][emoji1591][emoji1591][emoji1591][emoji1591][emoji1591]

 

[cdrinkh2o]

FYI....
I just found that if you have MDS or DiagCode, you can manually force the McLaren's DMTL (diagnostic module for tank leakage) system to run the EVAP leakage test. Of course you still have to find the leak if you have one using a smoke test.

More background can be found here.
EVAP Monitor on European Cars: Real World Diagnosis of DMTL Systems

 

[ppvsteve]

Just wanted to set the record straight ofthe info that you got from BAR:

The bar.ca.gov site says "PDTC presence will be ignored if the vehicle has completed at least 15 warm-up cycles and been driven at least 200 miles since its OBD information was last cleared". I questioned the inspector on this and he said that the test has recently changed to require at least 40 full drive cycles to exempt the P0442 PDTC code.

The inspector was incorrect on this. It might take 40 drive cycles to "clear" the PDTC but there was no rule change that required 40 to exempt it during a SMOG check. It is still 200 miles and 15 warm up cycles for the SMOG computer to ignore the PDTC. Glad you got it sorted!

 

[Slammp]

God Bless California, and I thought Massachusetts sucked

 

[DW SD]

I'm also in California.
I appreciate all of the info here.
I've been waiting for my 12C to be ready to smog test. The registration is paid, but it ran out January due to smog test.
At the time, my secondary air pump wasn't working due to a failed relay. After repairing, I cleared the CEL codes, which was maybe 100 miles ago and 5 trips.

I do have Mclaren MDS, but have just been monitoring for smog readiness using a bluetooth OBDII interface with iOS app.
EVAP Monitor on European Cars: Real World Diagnosis of DMTL Systems - new link. (above was broken)

I conclude I need to drive it more.
OR should I plug in MDS and see if I also have the 0442 code? Or manually run the evap leak test? If it passes its own diagnostic, will it turn off the readiness monitor?
I am tempted to clean the cap as the thrusting action sounds fun!

 

[ppvsteve]

You do not need the EVAP monitor ready to pass a CA smog check. Just go get your test. If they don't want to test it put in a complaint on them with the BAR. We got to deal with enough crap in this state with smog. We should not have to deal with people that do not want to do thier jobs.

The policy is to test every car as it is presented to them. They have no reason to turn you away with an incomplete monitor.

File a Complaint

 

[DW SD]

Thank you, Steve.
Would you recommend I do 15 warm up cycles first?
I do want to minimize hassle factor or returning more than once.
(I think your advice is to just go, independent of warm up cycles.)
I don't know if P0442 is a hidden trouble code or if it'd show up with my basic scanner.

Thank you,
Doug

 

[ppvsteve]

Well it says you got no permanent codes. Is there a data section on your scanner where you can read how many warm up cycles you have? Usually under "Datastream" or "live data" look for a PID called WARMS_UPS or something similar. Yea would be a good idea to get 15 warm ups under your belt just in case there is a hidden permanent code in there.
Most modern scanners will read mode 10 that is where they live.

 

[DW SD]

Thank you. I found the warm ups PID on one of the iOS OBDII apps I use.
I just changed the front timing chain cover seal and front main crank lip seal. And ran it several times to check for leaks. And also cycled to bleed and top off the coolant. So it sat on my lift through 5 or 6 warm ups. I suspect those don't count with no miles driven.
Appreciate the help!
Doug

 

[ppvsteve]

Thank you. I found the warm ups PID on one of the iOS OBDII apps I use.
I just changed the front timing chain cover seal and front main crank lip seal. And ran it several times to check for leaks. And also cycled to bleed and top off the coolant. So it sat on my lift through 5 or 6 warm ups. I suspect those don't count with no miles driven.
Appreciate the help!
Doug

Ah no they count. You can do 15 warm ups in your drive way if you want Most cars just up to 160 and down 40 degrees is considered a warm up cycle. Then do a 200 mile drive and you are good - That is If you had a Permanent DTC. Thats the only reason the 15/200 matters. I am not sure you do but yea I am not one to trust scanners either especially on cars like these.

 

[DW SD]

Ah! OK!
The drive is one 200 mile without shutoff? Or series adding up to 200 miles?
If the prior, then normally, I wouldn't hit that at all. But, would be fun!
Thanks again,
Doug

 

[cdrinkh2o]

Ah! OK!
The drive is one 200 mile without shutoff? Or series adding up to 200 miles?
If the prior, then normally, I wouldn't hit that at all. But, would be fun!
Thanks again,
Doug

It's 200 cumulative miles since last clearing the DTC codes, so either one or many drives.

 

[DW SD]

OK. appreciate it, Carl!

 

[ppvsteve]

Ah! OK!
The drive is one 200 mile without shutoff? Or series adding up to 200 miles?
If the prior, then normally, I wouldn't hit that at all. But, would be fun!
Thanks again,
Doug

no does not to be in one shot. The ECu keeps track of all miles driven on all trips and just keep adding.

 

[DW SD]

Wanted to report back. I passed smog yesterday.
I ended up with about 20 cold starts and 230 miles and the readiness monitors were satisfied. Prior to 70 miles on Sunday (Coronado and back to Encinitas), one evaporative monitor remained.
I didn't even check before going to the smog station, given the great info provided here.
I did buy a plastic funnel so I can cycle my filler at my leisure. AND I will always have a chuckle thinking about the 18 y/o on prom night description as I go to town cycling it.
The tech did find the emissions sticker on the engine hatch, inside corner and also VIN on the door sill. He had me make sure the OBDII connector was making contact and for a time rev the engine between 1500 and 2k rpm.
I had called ahead to make sure the tech didn't drive the car. He said he wouldn't have been able to smog it without my help. Not sure true, but it was uneventful and done in 20 mins.

Thank you,
Doug

 

[cdrinkh2o]

Wanted to report back. I passed smog yesterday.
I ended up with about 20 cold starts and 230 miles and the readiness monitors were satisfied. Prior to 70 miles on Sunday (Coronado and back to Encinitas), one evaporative monitor remained.
I didn't even check before going to the smog station, given the great info provided here.
I did buy a plastic funnel so I can cycle my filler at my leisure. AND I will always have a chuckle thinking about the 18 y/o on prom night description as I go to town cycling it.
The tech did find the emissions sticker on the engine hatch, inside corner and also VIN on the door sill. He had me make sure the OBDII connector was making contact and for a time rev the engine between 1500 and 2k rpm.
I had called ahead to make sure the tech didn't drive the car. He said he wouldn't have been able to smog it without my help. Not sure true, but it was uneventful and done in 20 mins.

Thank you,
Doug

Great job! Would you be able to share - stock ECU or tweaked?

 

[DW SD]

Stock ECM for my car.

 

[Skittles Garage]

I'm getting my 12C ready for a California BAR smog test. The stock ECU was reset to the original ROM by my McLaren tech, and all mods reverted to stock parts. I have driven over 850 miles in five full drive cycles. A drive cycle consists of startup from cold, 10-15 minutes of stop and go street driving, 10-15 minutes of freeway driving over 60 mph, and a further 10-15 minutes of street driving.

I have used a BlueDriver OBD2 monitoring device to check for DTC codes, and the SMOG readiness monitors to be set. There is just one Permanent DTC - P0442 - EVAP Monitor Not Ready. The car has not thrown P0442 since re-flashing the ECU, so I don't believe the EVAP system is leaking, and I think that the EVAP monitoring test simply has not yet run.

For those that have the technical experience, do you have any advice on how to get the EVAP monitoring test to complete and so remove PDTC 0442?

I'm in a time crunch (20 days to complete SMOG and registration process in CA), and don't have the time neeed to complete the 15 full drive cycles required for an exception to the EVAP monitor not getting set.

I know this is an old thread, but for anyone else in California who may see this thread in the future, you can mass SMOG without passing the EVAP monitoring test on cars newer than 1996.

 

[DW SD]

Hi Skittles,
Good to know! I think there is a minimum number of miles you'd have to drive before they'd pass you and after clearing the check engine light (and re-setting monitors back to zero).

Doug