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No real explanation for the original TPMS warning. It was parked in our garage while we were at Spring Break for the week. Going from memory, it was 25 psi and the others were 35 psi. I haven't checked them since, but haven't had the warning pop back up either and it's been a couple of weeks. However, the PTU warning seems unrelated to the TPMS warning. Or am I missing something?

Thanks for all of the information! Sounds like a trip to the shop is in order. How urgently do I need to get it in? It sounds like with the actuator motor stalled, the car is either stuck in AWD or FWD all the time. If I switch to the AWD screen on the dash, it shows all 4 wheels as blue. I'm guessing that means the PTU is stuck in AWD mode all the time? Correct me if I'm wrong, but it doesn't sound like I need to stop driving it immediately and take it to the shop tomorrow. My son drives it to school and home several times a day (maybe 50 miles a day and no more than 10 miles from home). I have some work travel coming up week after next so will plan on getting it in then.

I'm seeing lots of issues with the PTU regarding no drain plug, fluid changes, etc. However, not a lot on the actuator itself. Is the actuator in the PTU? I'm guessing it is, so likely need a whole new PTU? We've been driving it and (other than the AWD malfunction light) wouldn't notice anything wrong (no sounds/smells/etc).

2019 Ford Edge ST Turbo 2.7L

After I reset the AWD DTC, I started it back up and the same code came up. However, it has not switched the indicator light on. So it seems like it's going to come back after we drive it.

I received the recommended USB adapter, found the DTC, and reset it. Here's the code and additional details. I also attached a picture of the screen for even more details: Code: C0090 - 4WD/AWD Power Transfer Unit Actuator Additional Fault Symptom (:-18): -Circuit Current Below Threshold I'll do some additional research on this code. Sounds like I need to replace the AWD Power Transfer Actuator. How hard is that to do myself? Is there any issue continuing to drive it until I get it fixed?

Ordered the recommended USB adapter. How do I "clear the DTCs from the AWD module"? That's where I'm stuck at the moment. I assume I need the USB adapter to do this? We've continued to drive it without any issues.

Thanks for the reply! I have an el cheapo OBD2 scanner and don't get any codes: https://www.amazon.com/ANCEL-AD310-Enhanced-Universal-Diagnostic/dp/B01G5EA74I/ref=sxin_17_pa_sp_search_thematic_sspa?content-id=amzn1.sym.b747a510-73a1-4cf4-a45b-74fc1ab8af95%3Aamzn1.sym.b747a510-73a1-4cf4-a45b-74fc1ab8af95&cv_ct_cx=obd2+dongle+forscan&hvadid=725841564141&hvdev=c&hvexpln=67&hvlocphy=9015812&hvnetw=g&hvocijid=17226922833890435540--&hvqmt=b&hvrand=17226922833890435540&hvtargid=kwd-2385225293896&hydadcr=6388_13390662&keywords=obd2+dongle+forscan&mcid=185d8463bea6309999e1499a76cc7e37&pd_rd_i=B01G5EA74I&pd_rd_r=49840cad-6cbc-4ec2-b1f1-d7de65722e4e&pd_rd_w=N31ds&pd_rd_wg=ma4kM&pf_rd_p=b747a510-73a1-4cf4-a45b-74fc1ab8af95&pf_rd_r=SP2MGEJ6TZYDQRWWNQ2E&qid=1744643548&sbo=RZvfv%2F%2FHxDF%2BO5021pAnSA%3D%3D&sr=1-1-6024b2a3-78e4-4fed-8fed-e1613be3bcce-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9zZWFyY2hfdGhlbWF0aWM&psc=1 I'm completely open to buying a OBD2 dongle, but can you help me with what exactly to buy. Just to confirm, this is a wireless device that plugs into the OBD2 port and I connect wirelessly to my iPhone? Like this?: https://www.amazon.com/TOPDON-Bluetooth-Diagnostic-Performance-Bidirectional/dp/B0C3QQYQ1B/ref=sr_1_22_sspa?dib=eyJ2IjoiMSJ9.oSZcGr4VWn2_jjxpg3u0MHdHiDsZNns4gwmmZxl-iAYqCBbVT-DOtbbi6s77uyIvzwU6_wAzNjA_Xv2EnxDHp-9L6AZc8m9ne-_5KP3aq57IjPB2HFGL7gRwfqwwHjpDNyfu3tcdj_lWoBdy5aNVWPX7wS2QKehooQecUyjhNgbt_rcTw4Kl6YOOqnns8W1IDMf2Xkn56gmUiVy5s1xWbYt32hbhveNzGeoLPb7sl8mYu54FwKxwPIKY4OzPVUnpIvqM4t3BLsNAdirnRveGmQbUk9AH7AYENMwFChuI99w.ePVmBlIWinRSNo7txHBQBtdu-c8aRRMArQkb9KdIesE&dib_tag=se&hvadid=725841564141&hvdev=c&hvexpln=67&hvlocphy=9015812&hvnetw=g&hvocijid=17226922833890435540--&hvqmt=b&hvrand=17226922833890435540&hvtargid=kwd-2385225293896&hydadcr=6388_13390662&keywords=obd2+dongle+forscan&mcid=185d8463bea6309999e1499a76cc7e37&qid=1744643548&sr=8-22-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9tdGY&psc=1

Hello all! I have 2019 Edge ST with 124,000 miles that we just got from my in laws. We went on vacation for a week and it sat. We came home to a low driver side rear tire (25 psi) warning. I put air in it and the low tire message went away, but immediately had the "AWD Malfunction Service Required" for the past week. The car seems to be driving the same, but I can't get rid of the message. I tried my OBD reader (cheap Amazon one) and no codes. I tried unplugging the battery for ~15 minutes (positive only) and that didn't get rid of it. I stopped by Autozone and they said their reader wouldn't be able to tell them anything either. The only option left (that I can think of) is to take it to a dealer and have them look. I'm not a fan of that because they always find things $2000-3000 in things that need repaired regardless of what I bring it in for. It seems like the AWD message is related to the low tire message since they happened at the same time. Is there a way for me to remove/reset the AWD message? My intent would be to see if it comes back. Anything else that I should check before taking it in? Since it appears to be driving fine, should I be concerned about driving it? The tires are also close to needing replaced and have read that might be the issue as well. Do I really need to go to a dealer for this? Thanks in advance!