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Old 03-14-2011, 03:28 PM   #1
Manny330
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Car keeps failing inspection.

My car can not pass inspection due to the 02 sensors not being ready. Because of this, the computer at the inspection station can not get a reading on emissions. Could this be a case of a bad sensor?

My car also has been having a rough idle when stopped at a light. And the transmission light popped up maybe 2 times in the past 3 weeks. The car drives fine. Later this week I will go by my friends garage to see if i can get any codes from the computer.

The car has 144,000 miles and this is the exact wording on the inspection report.

Oxygen Sensor - Heaters / Not Ready
Evaporation System - Not Ready

Any Advice?
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Old 03-14-2011, 03:42 PM   #2
uzi577
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I know it sounds crazy, but try to get a properly working MAF. Sometimes it manages to cause some weird codes. However dont buy it just get properly working one for the troubleshooting. The only reason I say that is because you tranny light a long with emission code.
Or could be O2 sensors too.
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Old 03-14-2011, 04:48 PM   #3
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Did you clear the codes with a scanner? Every time you clear the codes or disconnect the battery, your ecu resets the emissions readiness monitors. These are self tests that the car must do in order to pass the obd 2 readiness check during a smog test. Most states only allow 1 monitor to fail/not run or else you will fail smog. Evap should run in most driving situations, so you may have something going on there. The O2S monitor should be easy to set. I dont know if you let your car warm up in the morning when you start it cold, but i would try starting it and letting it idle for 2.5 minutes from cold without touching the gas pedal. This should run the O2S heater test and set the readiness. Most newer obd2 scantools will tell you emissions readiness. Have your buddy scan for pending codes to because those will fail you even though you have no check engine light.
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Old 03-14-2011, 04:56 PM   #4
blown330ci
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I am so glad they don't have vehicle inspections where I live!!
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Old 03-14-2011, 05:16 PM   #5
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Your emissions readiness codes have not cleared as you either disconnected the battery and/or reset an existing CEL/MIL.

You probably need to go through at least 2-3 cold start cycles and drive the car from initial start about 10 miles in combination city and highway traffic, probably about 50/50%.

Then you need to make sure the emission readiness codes have cleared and you do not have a current CEL/MIL when you return to the emissions station for a test.

Any basic scan tool can indicate if the emission readiness codes have cleared, AutoZone or Advance Auto should have scan tools they can loan you.
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Old 03-14-2011, 08:47 PM   #6
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Thanks for the info!
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Old 03-14-2011, 08:57 PM   #7
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Not sure what NJ requirements are, but in CA a car has to go at least 75 miles without throwing codes or setting off the CEL. I just replaced all the soft goods on the FI system, CCV, & Intake system to seal up the vac leaks. DISA valve was not functioning and leaking vac, secondary air vac line to vac check valve cracked and leaking, CCV line to dipstick tube leaking. At 100K+ miles all the soft goods are no longer soft. More like hard and brittle. You can change them one at a time for the next few years or go through the entire intake system and replace them all at one time. Rough idle could be from vac leaks and also stuck ICV.
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Old 03-14-2011, 09:20 PM   #8
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I've dealt with this problem with a dodge stratus. Every where I took it told me to drive it more and do all kinds of crazy ****... put the AC on, go to 55 and coast to a stop, blah blah blah. (I put almost 500 miles on the car.) Theres only one good piece of advice in this situation, and I wouldn't invest any money into anything else until you take it to the dealer and have them reflash the ECU with the newest software. An experienced service tech would give you this advice, and it is golden. I put about 140 miles on the car after that and took it in and it passed with no issue.
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Old 03-17-2011, 10:12 PM   #9
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In NJ it was recently changed. Your car can have a service engine light or any light on the dash, throw any code as long as it passes emissions. Im going to bring it to a reputable shop that works on bimmers to see what they say. I know something going on because if the rough idle.
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Old 03-18-2011, 04:01 AM   #10
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Get the codes read at AutoZone, you probably have a problem with the O2 sensor heater and at 144.000 mile they probably should have been replaced.
They are normally 100,000 service items, 150,000 for the M56 ULEV.

You must drive at least 20 minutes for the Evaporative emissions test to run. You may have to do it twice, it only runs every other time the test conditions are met.

http://www.bmwmotorsports.org/BMW_docs/m54x5.pdf

LEAK DIAGNOSIS TEST PRECONDITIONS
The ECM only initiates a leak diagnosis test every second time the criteria are met. The criteria
is as follows:
Engine OFF with ignition switched OFF.
Engine Control Module still in active state or what is known as "follow up mode" (Main
Relay energized, control module and DME components online for extended period after
key off).
Prior to Engine/Ignition switch OFF condition, vehicle must have been driven for a minimum
of 20 minutes.

Prior to minimum 20 minute drive, the vehicle must have been OFF for a minimum of 5
hours.

Fuel Tank Capacity must be between 15 and 85% (safe approximation between 1/4 -
3/4 of a tank).

Ambient Air Temperature between -7C & 35C (20F & 95F )
Altitude < 2500m (8,202 feet).
Battery Voltage between 11.5 and 14.5 Volts
When these criteria are satisfied every second time, the ECM will start the Fuel System Leak
Diagnosis Test. The test will typically be carried out once a day i.e. once after driving to
work in the morning, when driving home in the evening, the criteria are once again met but
the test is not initiated. The following morning, the test will run again.
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Last edited by shanneba; 03-18-2011 at 04:13 AM.
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