Notifications
Clear all
0
02/02/2021 12:30 pm
Topic starter
- Good morning Scotty, so my car was running bad a while ago po300 turns out it was bad coils codes went away and ran good, during this I assumed an o2 was bad before doing coils so I replaced the sensor and that did nothing(thus doing the coil instead) now I've been getting a code for po1153 AF sensor no heated up or whatever the actual wording is for that code car ran fine, reset the code and now it's just po171 car had a slight studder but nothing serious(yet I assume) also me and my buddy did a muffler delete for louder exhaust, I used the sensor 02 sensor but I kind of did a sloppy job replacing it as the wires were twisting on themselves when I tightened the 02 sensor idk if that matters but is worth saying, thanks so much
1 Answer
0
02/02/2021 12:37 pm
P0171 is System Too Lean Bank 1
Start here: https://www.obd-codes.com/p0171
Also, double check and reinstall the 02 sensor (to eliminate the low hanging fruit causes). Hopefully, you also used OEM sensor.
Do you have any live data or freeze frame you can share?
I assume denso is Toyota OEM and not at the moment, my friend has my scan tool but I'll freeze frame the data when I'm off work, I'll reinstall the 02 sensor as well, thank you for your response!
I remember my buddy had this problem on his 06 Scion tc and he cleaned his MAF sensor, I will also post the MAF data as well, it didnt hesitate bad but I'd Rather handle the problem while it's small
The link was very helpful btw!