My ES300 (2000) catalyst and evap monitors refuse to set and become "ready". I have driven 100's of miles following the drive cycle for both 1999 & 2000 ES300 (just in case year is off).
There are no trouble codes or CEL. Car basically runs fine for a 20 year old 100k miles.

I changed Bank 1 a/f sensor a couple of years ago with the Denso model. And a few days ago, I just changed bank 2 and the post cat O2 sensor as preventive maintenance (both fairly old).

Below is a link to a graph showing short term fuel trim comparing bank 1 and bank 2. I can't believe the difference. Can anyone explain? Also - why would evap and cat not "test" and either report a code or set the monitor as "ready"? It's really frustrating - either break or don't bother me. This OBD2 readiness crap is annoying.

https://www.dropbox.com/s/6wxl9w87v4..._trim.png?dl=0

 

Do you smell fuel from your exhaust or with the windows down when the engine is cold? any intermittent misfires at low or high rpm's? rough idle?

Probably bad fuel injector(s). Could also be an ignition coil.

 

STFT on bank 1 does differ from B2 but if ECU can still compensate for FT adjustment, it still should be fine.
What are your Long term fuel trims on both banks? (idle)
What are voltage readings for AF on both banks? (idle)
^^^
Same above readings but at around 2000 rpm
Just want to see if its compensating for rich or lean running on bank 1.

You mentioned no codes present but do you have any "PENDING" codes stored?

 

No pending codes. Below is more data from Torque Pro test results. Not sure how to read the cryptic text:

Mode $06 report generated by Torque for Android
================================================

Vehicle VIN: Not present
Vehicle Manufacturer: Unknown
Vehicle Calibration ID: Not present

Unit and scaling information are not supplied with the data from the ECU for this type of vehicle. Consulting the manufacturers service book for this information is recommended.

Test report:
------------------
TID:$02 CID:$01
- Lean to Rich sensor threshold voltage(constant)
Min: 87
Test result value: 255
PASS
----
TID:$02 CID:$02
- Lean to Rich sensor threshold voltage(constant)
Min: 64
Test result value: 255
PASS
----
TID:$04 CID:$02
- High sensor Voltage for switch time calculation
Min: 2,621
Test result value: 6,929
PASS
----
TID:$06 CID:$01
- Lean to Rich sensor switch time(calculated)
Max: 16,384
Test result value: 6,217
PASS
----
TID:$06 CID:$10
- Lean to Rich sensor switch time(calculated)
Max: 16,384
Test result value: 1,767
PASS
----
TID:$07 CID:$01
- Minimum sensor Voltage for test cycle(calculated)
Min: 1,441
Test result value: 33,182
PASS
----
TID:$07 CID:$10
- Minimum sensor Voltage for test cycle(calculated)
Min: 1,441
Test result value: 33,663
PASS
----
TID:$08 CID:$01
- Maximum sensor Voltage for test cycle(calculated)
Min: 184
Test result value: 184
PASS
----
TID:$02 CID:$01
- Lean to Rich sensor threshold voltage(constant)
Min: 87
Test result value: 255
PASS
----
TID:$02 CID:$02
- Lean to Rich sensor threshold voltage(constant)
Min: 64
Test result value: 255
PASS
----
TID:$04 CID:$02
- High sensor Voltage for switch time calculation
Min: 2,621
Test result value: 6,929
PASS
----
TID:$06 CID:$01
- Lean to Rich sensor switch time(calculated)
Max: 16,384
Test result value: 6,217
PASS
----
TID:$06 CID:$10
- Lean to Rich sensor switch time(calculated)
Max: 16,384
Test result value: 1,767
PASS
----
TID:$07 CID:$01
- Minimum sensor Voltage for test cycle(calculated)
Min: 1,441
Test result value: 33,182
PASS
----
TID:$07 CID:$10
- Minimum sensor Voltage for test cycle(calculated)
Min: 1,441
Test result value: 33,663
PASS
----
TID:$08 CID:$01
- Maximum sensor Voltage for test cycle(calculated)
Min: 184
Test result value: 184
PASS
----


End of report.

 

Don't know how to check for misfires - my torque pro app doesn't seem to show that.

There is no fuel smell. In fact, the exhaust smells quite clean and normal.

Idle is steady whether cold coming up to temperature or after 30 minutes driving and at temperature (i.e. ~ 180-200 degrees F).

I replaced coil packs over the years as they failed. I did all of bank 1 at the same time a few years ago (~20,000 miles ago).

 

My ignorance but i also have no idea what those are.
You should be able to see current data while doing idle and rpm test and see what values you have.

 

whats your fuel economy like?

 

No idea ... to be honest, it "seems" normal, meaning I don't add gas often. This car is not driven much and mostly around town for errands.
I only recently took it out on the highway for 50 miles at a time in order to try and set the catalyst and evap monitors (by driving 60 mph for 10 miles, slow to 45, stop, idle, repeat, etc....)
There is no smell of gasoline out the tail pipe, runs clean.

 

I think your car is fine.

Try to avoid short distance driving until your engine is fully warmed up though.