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Old 02-02-2020, 02:18 AM   #1
Corn_Bread
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Default Help monitors incomplete

Been doing some searches and still have drawn a blank on finding a fix. Everything is for modded exhaust. I have a stock 2017 sti and had a battery die on it. After I jumped the car the check engine light came on with a o2 sensor low voltage. After battery change no codes and no engine light. Canít get it to pass emissions because a evap mon is not ready and my oxygen sens mon is not ready. I have driven it over 300 miles. Drove it steady speed of 55mph with cruise for 20 mins straight at half a tank. Iím at a loss. The car is stock but it just will not set these last two to ready. I need help because I canít register it till it passes and tickets are expensive.

Any thoughts or help would be really helpful.


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Old 02-02-2020, 08:28 AM   #2
Jay11STI
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Pretty much anytime the battery is reset or dies the OBD readiness monitor status will reset. On other cars, when clearing faults or codes, the ecu it will also do this. Id like to say Subaru would be no different but not 100% sure. Either way getting readiness monitors to set is tough. There are certain specific precedures and specific drive cycles that have to be followed in sequence to set certain monitors to ready. Usually the best advice is to just continue driving the car.

Here is something i found doing a quick google search. I dont know how accurate it is but it may help. At this point, you have nothing to lose.

https://subaru.oemdtc.com/341/readin...05-2015-subaru
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Old 02-02-2020, 05:21 PM   #3
heiche
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also make sure fuel level is between 1/3 and 2/3 or it won't complete some codes.

update: i see u mentioned 1/2 tank

Last edited by heiche; 02-02-2020 at 05:51 PM.
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Old 02-03-2020, 01:18 PM   #4
Corn_Bread
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i thoght i have done everything. 500 plus miles now and still they are not ready. got pulled over today and got my first fix it ticket related to this.
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Old 02-03-2020, 09:53 PM   #5
08SpecB_DE
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Do you have any codes pending? Evap is usually the last monitor to complete and may not complete until O2's clear. Perhaps a fuse blew when you jumped it.
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Old 02-04-2020, 01:57 PM   #6
Corn_Bread
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No codes or anything. The heater is ok on the o2 but the sensor monitor says inc. not sure what to do. Thinking about seeing if there is a pcm update from Subaru and getting it flashed with any updates.
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Old 02-04-2020, 08:02 PM   #7
Corn_Bread
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Wow I didnít realize this was a issue nobody knows anything about. The dealer said it should have set In The first 100 miles. Want to charge me 185 bucks to diagnose the issue. But they also said there would be a code if there was any issues. So it sounds like they want 185 bucks to not do anything. Iím bout frustration to the max right now.
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Old 02-05-2020, 12:13 AM   #8
08SpecB_DE
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Have you checked the fuses?
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Old 02-05-2020, 12:32 AM   #9
Corn_Bread
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Quote:
Originally Posted by 08SpecB_DE View Post
Have you checked the fuses?


What fuse do I need to check. Iím brand new to this platform. If a fuse was bad wouldnít it throw a check engine or some code in the computer?
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Old 02-05-2020, 12:44 AM   #10
Corn_Bread
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Default Help monitors incomplete

Since I got it used could it have a tune that has the o2 turned off?

How would I check and how can I get it flashed back to stock if it is the case without my warranty being voided
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Old 02-05-2020, 10:55 PM   #11
08SpecB_DE
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Check all of them. Voltage spikes from jumping a car has been known to fry things in some cases. If it had a tune, that monitor would be bypassed and always read "complete".
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Old 02-14-2020, 12:11 AM   #12
Corn_Bread
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found the issue. it was a leaky gasket before the cat right in front of the rear o2 sensor
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Old 02-14-2020, 10:15 AM   #13
08redWRX
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Glad you found the issue and I hope got it resolved.
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Old 02-16-2020, 12:19 AM   #14
Subie_
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Crystal gray metallic

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fyi... CELs can be disabled & readiness monitors set to "always ready" using Accesstuner Race
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