OBDII not ready issues

Dirty Dan 603 · Apr 11, 2020

Hello,

I've been having an issue with the oxygen, catalyst and evap showing not ready. All other sensors indicate ready. My car is a 2017 WRX limited 6MT with a Cobb cold air intake, accessport and running the Cobb Stage1+ BigSF 93 v350 map.

I was already having these issues when I woke up to a completely dead battery the other day. I read that low voltage can be a cause for the sensors not performing the tests so I'm hopeful that these issues will resolve now that I have installed a new battery. I also verified that the map I have loaded is the most current version from Cobb.

I know that it can some time after replacing the battery for everything to ready itself but so far i'm 3 cold start drive cycles in to no avail. I'm going to continue to drive the car, but does anyone have any suggestions or insight into what else I could attempt?

Thanks

219673 · Apr 11, 2020

It took a few weeks for mine to trigger ready on my 2011

Tiredguano · Mar 15, 2021

I am running into a very similar issue with my 2016 WRX. Basically identical situation down to the dead battery. Were you able to get it resolved? I am completely stumped.

stilletto · Mar 15, 2021

There are multiple steps.

How to Perform a Basic Drive Cycle for Emissions Testing

Learn how to perform a basic drive cycle for effective emissions system testing with step-by-step instructions and vehicle preparation tips at RepairPal.com.

repairpal.com

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Tiredguano · Mar 19, 2021

stilletto said:
There are multiple steps.

How to Perform a Basic Drive Cycle for Emissions Testing

Learn how to perform a basic drive cycle for effective emissions system testing with step-by-step instructions and vehicle preparation tips at RepairPal.com.

repairpal.com

Sent from my iPhone using Tapatalk

Thanks. I will keep trying this!

DirtModJunkie · Mar 31, 2021

Bear with me, this may help...
I have an 03' WRX stage 2 and I cant find my EVAP small leak and keeps throwing a code.
Having to reset when EVAP throw CEL(causing CAT and EVAP unready), I read about readying the catalyst to have only 1 unready(EVAP) when inspection time as NY allows 1.
When you do your cycle, I found you HAVE to turn on AC/defroster for at least 5 min straight during cycle to ready CAT.
My ride to work is 30 min(about 22 miles), short town ride to highway, about 8 miles on highway, then about 12 miles mixed driving stop & go 30-60mph.
During the ride, I would turn on AC/defroster for duration on highway, turn it off for 5 min off highway, back on for 5+ min etc.
Started checking AccessPort for readiness after 50 miles and Catalyst readied within 10 miles after, all while doing AC/defroster on-off.
Good luck!

Tiredguano · Apr 2, 2021

Thanks for the advice! I was able to get the 02 sensor ready with your method. Now just need the Cat and Evap. I do have a code currently of P0171 system too lean. That was after I unmarried the accessport because with the tune it seemed to never ready even after 200 miles.

realxav · May 21, 2023

Hey! I just bought my wrx around December, same make and model as yours and I’m having the exact same issues. Did you ever end up figuring out how to solve them?

OBDII not ready issues

How to Perform a Basic Drive Cycle for Emissions Testing

How to Perform a Basic Drive Cycle for Emissions Testing

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