Bmw obd not readyOn 28.10.2020 by Voodoogul
Sign up for a Slickdeals account to remove this ad. First Unread. So I replaced battery, alternator on my ford focus from firestone and took it for emissions test at Jiffy lube.
They come back saying, my OBD hasn't had time to read the values and ask me to drive it for another to miles and bring back for test. I asked them how it can not be ready and they are like ' any power disruption will cause OBD to lose its stored values. You just need to drive around and do nothing else The OBD is still not "ready" and they waive my emission fee and ask me to drive around for more distance and bring back the car. Is this normal or is there something wrong with my car? It used to pass emission always:- thx.
Add a Comment Sorry, this thread is closed. This comment has been rated as unhelpful by Slickdeals users. L6: Expert. Quote from stubbornboy :.
L Grand Master. That's normal. What they told you is true. Because you disconnected power, the OBD can't give a clear reading until you drive the car a bit. The mileage driven isn't quite as important as the type of driving. The sensors need to report their full range of values before the computer decides they're operating correctly. For example, the oxygen sensors, which I'm guessing your car has an upstream and a downstream sensor, need to warm up to operating temperature and then report proper values in relation to the other information the computer receives concerning engine speed, vehicle speed, engine temperature, and on and on.
This self-test will be completed sooner with a combination of idling and city and highway driving. For anyone hard core about car repair, there are a number of products that will connect a laptop or PDA to the ODB connector and you can scan trouble codes and monitor the sensors, albeit with some lag. The one I have shows when the self tests are complete and the vehicle is ready to be smog tested.
If you disconnect the battery it erases the readings. The OBD sensors much like anything connected to the ECU require self-calibration to function correctly, which requires driving around. L2: Beginner. When you disconnect the battery from the car, all of the stored engine codes if any are erased temporarily until it is set off again.
Most testing centers machines require that the iginition be switched on and off almost 50 times to get the most accurate reading.Remember Me? General BMW Discussion. Page 1 of 2 1 2 Last Jump to page: Results 1 to 25 of Thread Tools Show Printable Version. There is no SES, no active or stored codes, and no driveability issues whatsoever.
According to what I've read, the car will pass NYS inspection with one check incomplete, so I'm not worried about that. Basically I just want to understand the cause. The procedure to complete this test is three minutes of idling on a cold engine - while I haven't specifically done this I'm going to do it tomorrow just to be sure, but I'm certain that at some point in the last four months I've idled the car cold for three minutes.
Of course if that solves the problem, I'm going to seem quite the idiot, but I digress. Research has suggested that this is likely due to something in the valves or plumbing that make up the evap system.
Does anyone have specific knowledge of the inner workings of how OBDII completes this check so that I can sort out exactly what's going on? Thanks very much. Life's tough. It's tougher when you're stupid.
Q: Failed smog test. OBD-II monitors not ready. Needs to be reset
I may be off in my assessment, but I found via a search one example of a similar problem that required the replacement of certain valves the post was unclear as to exactly which valves in order to correct. Similarly, in that case there was no fault code; it was merely a case of uncompleted testing. However, there were two incomplete tests, causing an inspection failure. Update: I cold-started the car and let it idle for five minutes; this should be more than enough to perform the evap system test according to the documents I found.
The result?It is possible to check OBD II monitor readiness on many late model vehicles without connecting a scan tool. This can often be necessary in order to determine if your car is ready for its California smog inspection. These checks are performed in the background during normal driving and are designed not to interfere with vehicle performance or safety.
Driving the vehicle under conditions that meet the monitor enabling criteria should complete most OBD II monitors. However, the following procedures are presented as examples. They may not apply to your specific vehicle. To check if the readiness codes are set, turn the ignition switch to the ON II position, without starting the engine. The MIL will come on for 20 seconds.
If it then goes off, the readiness monitors are set. If it blinks five times, the readiness monitors are not set. If you crank or start the engine, you will have to start this test over. Approximately 15 seconds later, one of two things will happen: The MIL will flash for about 10 seconds and then return to being fully illuminated until you turn OFF the ignition or start the engine.
Like this: Like Loading Leave a Reply Cancel reply. Sorry, your blog cannot share posts by email.If your monitors are showing not ready, then that is because the computer was recently reset or the battery may have been replaced. If either of these occurred, then there is a specific amount of driving that needs to be done in order to get these to reset. The driving that needs to be done has to include things such as highway driving, stop-and-go driving, accelerating, braking, and many on and off key cycles.
This can take anywhere from up to miles of driving as long as it is varied as I mentioned. If you would like to get an estimate for this, you can enter your vehicle information on our estimator page to get a quote.
Q: Failed smog test. OBD-II monitors not ready. Needs to be reset asked by George M. Failed smog test. Need to be reset. How much will this cost? My car has miles. My car has an automatic transmission. Robert Tomashek Automotive Mechanic.
Thank Robert. Was this answer helpful?
Thank you for your feedback! Sorry about that. Why wasn't this information helpful? The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details. Related Questions. How do I turn off the wrench shaped light on the dash by Mark S.Two types of monitors are present in our vehicles — continuous and non- continuous. Continuous monitors operate as long as the engine runs.
Whereas, non-continuous monitors need certain conditions like speed, ambient, acceleration, fuel level, and much more to carry its testing process. Catalyst Monitors are non-continuous monitors that assess the ability of the catalytic converter to decrease harmful emissions.
It signifies that the requisite Drive Cycle has not run completely; thus, the catalyst monitor has not tested the catalytic converter. The first and foremost step is to check whether the engine light is off.
If your vehicle has active trouble codes, it may stop a monitor from running completely. The drive cycle starts with a cold start. You can achieve this by allowing your car to sit overnight. The next step is to start the engine and keep it idle for two and half minutes, keeping rear defroster and AC on.
During this period, the purge and Fuel monitor diagnostics will take place. The catalyst monitor diagnostics will take place during this period.
If the battery is detached or the catalyst is not ready, it might take five complete driving cycles to decide the status of the catalyst. For additional information about catalyst monitor, one can refer to maintenance tips by car experts. Now, make your vehicle slow down and allow it to sit idle for 2 minutes. Tsukasa Azuma is an awesome car blogger of Car From Japan. He owns a car repair shop at downtown Osaka, and he put all that experience to good use in his sharing posts. Is an Engine Flush Good or Bad?
Login with Google. Likes Followers Followers. Import used cars directly from Japan. Maintenance Tips. By Tsukasa Azuma Last updated Sep 5, Make Sure the Engine Light is Off 2. Check if your Vehicle has a Coolant Temperature 3. Let the Engine be Idle for 2 Minutes 4. Again Speed Up 7. Stop the Vehicle. Steps for catalyst monitor not ready.
Tsukasa Azuma. Show Comments CFJ Kenya. CFJ Mozambique. CFJ Malawi.
OBD2 Car Diagnostics Blog
CFJ Tanzania.If you live in an area that requires emission checks, then you may have encountered a reading that says test not ready or something along those lines. This could have caused you some headaches when you went to the DMV or state testing area. This is because you have to go back at a different time and have the test done and you may not even know what this issue really is. The onboard diagnostic system has two different categories of tests that it runs to make sure it is running smoothly.
The different tests that it does to make sure emission levels fall into a safe zone fall into two categories. Those are the continuous test which is performed all the time while the vehicle is running and non-continuous monitors that only occur at specific times after certain requirements are met.
The checks that happen every time you drive your vehicle are misfire monitoring, fuel system monitoring, and comprehensive component monitoring. No matter how long you drive your vehicle or at what speed, these checks occur. With misfire monitoring the computer checks to make sure the engine is firing correctly. It checks to make sure the ignition and fuel mixture is correct. This because if it is not than emissions may be increased and this can cause damage to the catalytic converter.
What Should You Do When OBD2 Monitors Not Ready To Test?
The fuel system check is very similar. This only looks at the fuel mixture and makes sure that the right amount of air and gas ratio is being met. This again makes sure that emissions are at the proper level. Lastly, the comprehensive component check makes sure that all the major sensors are working. This ensures that all the other things are being monitored right and that no computer related issues are going on.
Also, some sensors affect how much air and fuel end up in the gas mixture, so it makes sure those are working right. The non-continuous checks are the EVAP monitor which is evaporative emission control system, the HEGO monitor which is the heated exhaust gas oxygen sensor, and the catalyst efficiency monitor. The EVAP monitor checks to make sure that there are little to no fuel vapor leaks, which can include a loss or missing gas cap. It does this test by applying a vacuum to the gas tank system when certain conditions are met.
While the system is under vacuum or pressure, if it does not detect airflow while the canister purge valve is open, then it passes.
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Otherwise, it will trigger a code if the airflow reads to high. The HEGO monitor checks to make sure that the oxygen sensors are running properly and within there normal range. This check runs when the engine gets to operating temperature and a specific speed is met.
The catalyst efficiency monitor makes sure that the catalytic converter is running at high enough efficiency to keep exhaust in an appropriate range for the amount of emission the vehicle is putting out. All vehicles put out some emissions, but the test is to make sure that it is not putting out more than it is supposed too.
The way the test works is it compares the signals from the upstream and downstream oxygen sensors. If it has a reading of less than 80 percent on most vehicles for any pollutant, then it will trigger a code.Forums New posts Search forums. What's new New posts New profile posts. Members Registered members Current visitors New profile posts Search profile posts.
Feb 23, 6 Creve Coeur, Missouri. I know it's not the OBD reader, so what could it be? Is there a fuse that powers the "reader" outlet? I didn't see as much in the manual. Oct 24, 0 A. Any of the pins bent? Wouldn't hurt to check all the fuses I suppose. Sorry can't be more help. None of the pins bent
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