Evap system showing incomplete

Just got the catalytic converter replaced in my 02 with just over 201k on it. It failed inspection with the cat and evap system. The mechanic said there's nothing wrong with the evap system and it should clear at some point. I've put close to 200 miles since the cat was replaced and that's showing complete in Torque but the evap system is still showing incomplete. Should I get a second opinion or just cool my jets and wait a bit longer?

 

Evap on the older Toyotas is a pain, it takes a long time for it to decide that the system is sealed or leaking.

I would wait longer, but heres the pattern that I found.

Preconditions The monitor will not run unless:

MIL is OFF
Altitude is 7,870 feet (2,400 m) or less
Engine Coolant Temperature (ECT) is 41°F (5°C) or higher
Intake Air Temperature (IAT) is 181°F (83°C) or higher Drive Pattern

(a) Connect the OBD II scan tool to the DLC3 to check monitor status and preconditions. (b) Drive vehicle at 43 – 56 mph (70 – 90 km/h) for a period of 3 – 5 minutes.
NOTICE: Do not allow the Throttle Position (TP) to exceed 30 %. Drive with smooth throttle operation and avoid sudden acceleration.
(c) Stop vehicle and let engine idle for 3 – 5 minutes. (d) Repeat steps ”b” and ”c” once. (e) If readiness status does not switch to complete, ensure preconditions are met, turn ignition off, and then repeat steps ”b” through ”d”.

 

Thanks for the info! That's very helpful, I'll give it a bit more time before I try anything. Honestly all that's missing from that procedure is "jiggle the handle and it should work" lol

 

This is what worked for me a few weeks ago. Drove the taco ~500 mile with a mixture of in town, stop and go, and highway driving and still the evap wasn't ready.

Prior to parking the car over night, I went ahead and erase the memory in the computer (even tho there was no mil light on) with the scanner. Then I open the gas cap to release the pressure in the tank and reinstalled the cap. Next morning, prior to starting the truck, I open and closed the gas cap again to release any remaining pressure. I start the truck up, let it idle and instantly turned the AC on, on full blast and let it idle. 15 minutes later, I go and check the scanner and evap was green and good. Drove the truck 20 miles in stop and go traffic and all the monitor was good. Took it straight to the smog station and passed!

Give it a try, worked on my taco...

 

Evap system can be trickey. I went the cheap route and replaced vsv(s) first then canister as I will never surrender this truck, but I am in salt laden N.E. and it turned out to be pinholes in top of fuel tank. I would say if you are getting any gasoline fumes outside of truck then fill tank and smoke test it to save time and money.

 

Also struggling with EVAP codes . Another quick old school method to check for leaks in the head space above the gas is to pressureize the from the gas filler with a rag wrapped around a compressed air nozzle. Just a little pressure with a friend listening for leaks and or spraying soapy water on hoses suspected of leaking. May not be too good for small leaks but will detect big ones...
My next big tool investment will be a smoke tester.

 

In my state I Believe you are allowed to have one of the monitors in an incomplete state and still pass inspection as long as you the CEL is off.

 

That's why I hate cali!

Pre '00, yes that's also allow per carb, but some shop will not smog until all monitor are on, so it really depends on the actual shop. After '00, all monitor must be on, not in closed loop.

 

I know this is super old but I just did this on my 04. I’ve been having trouble getting the evap monitor to finish and be “ready”. Did exactly what you said and it worked first try

 

Nice. Glad you got it going

 

Reviving an old thread here....

I was chasing a P0171 code for a few months and finally tracked it down and fixed a vacuum leak about 945 miles ago.
When I fixed the vacuum leak I cleared the code and turned off the CEL.

945 miles later my evap readiness monitor is still not complete and my truck is due for smog by the end of March. I've been driving in all kinds of conditions. From cruising dirt roads in the desert, highway and city driving. Lately it's been 100% city driving. The truck has temporarily replaced my car as my daily driver until it passes smog.
I've been keeping my truck's tank between 1/4 and 3/4 full.
I let it cold sock for 8-24 hours every night.
Before and after I drive it I open the gas cap to release any pressure.

I'm going to try the above tomorrow.
I don't think I'm going to erase the computer's memory. With the supercharger it takes it a little while for it to adjust to the supercharger. In the meantime it kinda drives like shit. So, I'd much rather try this without erasing the memory.

 

Did it cure your issue?

 

Nope, still there.

BUT! I have good news!

As of 2018 in California you can still Pass smog with the evap monitor not complete.

I’m going to my favorite smog shop tomorrow.

 

I had that issue on my tacoma when my battery went dead. I ran the truck on the freeway at 55mph for like 20 miles and it wont not go away until i disconnected the battery and tried the process again.

 

I could be wrong but I think that only applies to pre-00. My understand is any vehicle 00 or newer must have all modules in a ready state.

Update if you're able to smog your tacoma with 1 module not ready.

 

Will do.
I have my doubts as well. I've been thinking the same thing ...only pre-00 can have 2 (or was it 1?) modules not ready.

I think this is the only place I've found it that's a legit website. Asktheref.org is the BAR referee website.
Way down at the bottom under where it says A vehicle will not pass smog check if it is - "Gas Powered and Hybrid: 2000 and newer with more than the evaporative system monitor incomplete"
https://asktheref.org/About/Monitor-Readiness-Concerns

First I read it here -
https://www.smogtips.com/smog-quest...d newer model year,cause a smog check failure.

Then here -
https://antiochstarsmogcheck.com/is-my-car-ready-for-a-smog-readiness-monitors-and-drive-cycle/


The last two aren't an any way official sites to....

I did look around on the BAR website but couldn't find anything.

 

Found it on the BAR site.
https://www.bar.ca.gov/Industry/Ind...#table-1-obd-test-monitor-readiness-standards

 

I didn't know this and had a hard time to get rid of EVAP fault before passing smog test.

 

Right?
I can't help but still be a little skeptical.
I've spent a lot of time recently reading about P0171 codes, smog, superchargers, obd2 monitors, the evap monitor in particular and so on.
How did I miss this during that whole time? It must have come up on one of my countless internet searches.
Hell, I'm furloughed from work right now so this is pretty much all I've been doing with my time lately.

 

I cant emphasize just how important it is the have the fuel tank between 1/4 and 3/4 full with 1/2 to 3/4 being better. If the PCM reads more or less fuel than that the evap monitor WILL NOT start and this has to be done twice with a minimum of an 8 hour cool down perieod between.

v5ensx chart is exatcly the procedure.