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View Full Version : My car failed smog ** OBDII readiness questions



Kyle H
08-13-2010, 04:04 PM
passed the sniffer and visual test with no problems (with my techtonics tuning high flow cat)

Readiness is where I failed. My O2 sensor didn't complete readiness, which means my cat didn't complete readiness, and my EVAP didn't complete.

I guess I need to get new O2 sensors, right?


Does OBDII use both O2 sensors or just one? I don't want to replace both if I don't have to.


edit-
also, the car isn't throwing any O2 sensor codes. [headbang]

nunya
08-13-2010, 04:05 PM
When is the last time you cleared the ECU prior to taking it up there?

--dillon

nunya
08-13-2010, 04:14 PM
You can also force readiness tests:

have had luck with some of these and some not. When all else fails take a 30 minute ride in between 50 and 60. Not more or it will fail.

A/C must be off during all of this. Coolant temp at least 185 deg F.

Erase any DTCs

Diagnosis of EVAP canister purge regulator valve
engine at idle
Basic settings: 070
If test is not initiated or the display jumps from test on to test off slightly accelerate engine briefly, test will be repeated
EVAP OK should appear

Diagnosis of tank leak test
This diagnostic is locked the first 230 seconds after engine is started
engin at idle
intake air temp less that 95 celcius (004 I believe)
basic settings 071
test duration appox 60 seconds
should the diagnosis be repeated several times, open fuel filler cap each time to release pressure in tank
System OK should appear

Diagnosis of fuel supply system
engine at idle
oxygen sensor control active
basic settings 107
If test on does not appear turn engine off and restart, repeat
System OK should appear

Diagnosis of oxygen sensor heater
basic settings 041
increasing engine speed accelerates the obtaining of specified values
basic settings 042

Diagnosis of oxygen sensor aging before catalytic converter
engine running at 1900-2200 rpm
basic settings 034
B1-S1 OK should eventually show
basic settings 035
B2-S1 OK should show

Diagnosis of operational readiness of oxygen sensors behind TWC
engine at idle
basic settings 036
B1-S2 OK and B2-S2 OK should display

Diagnosis of oxygen sensor control system
engine at idle
basic settings 037
System OK should eventually display
basic settings 038
System OK should eventually display

Diagnosis of oxygen sensor behind catalytic converter
engine running at 1900-2200 rpm
basic settings 043
B1-S2 OK should eventually show
engine running at 1900-2200 rpm
basic settings 044
B2-S2 OK should eventually show

Diagnosis of catalytic converter
engine running at 1900-2200 rpm
basic settings 046
the test duration for the catalytic converter takes approx 60 seconds
Cat B1 OK should eventually display
engine running at 1900-2200 rpm
basic settings 047
Cat B2 OK should eventually display