Want to have the best looking and running 2016 Prius around? Having trouble with something and need help from others, including certified Prius mechanics? Post here! Mon, 20 Apr 2026 16:04:52 +0000 Mon, 20 Apr 2026 16:04:52 +0000 PriusChat https://priuschat.com/forum/gen-4-prius-care-maintenance-and-troubleshooting.155/ Mon, 20 Apr 2026 11:18:14 +0000 https://priuschat.com/threads/2018-prius-3-engine-vibration-on-decel-and-low-throttle-input.259751/ https://priuschat.com/threads/2018-prius-3-engine-vibration-on-decel-and-low-throttle-input.259751/ invalid@example.com (michaud85) michaud85
I was thinking of cleaning intake manifold ports, egr pipe and egr valve and skipping the cooler (it looks like you have to move the inverter)

I also thought maybe...

2018 Prius 3 engine vibration on decel and low throttle input]]> 9 Sun, 19 Apr 2026 21:41:51 +0000 https://priuschat.com/threads/rear-wheel-bearing.259552/ https://priuschat.com/threads/rear-wheel-bearing.259552/ invalid@example.com (Skitchin1) Skitchin1 2 Sun, 19 Apr 2026 19:17:15 +0000 https://priuschat.com/threads/2016-prius-two-eco-rear-brakes-what-am-i-doing-wrong.259728/ https://priuschat.com/threads/2016-prius-two-eco-rear-brakes-what-am-i-doing-wrong.259728/ invalid@example.com (King_V) King_V
I've got about 80k miles on my Prius, and I was told that the rear brakes are very low. Of course, the dealer would love to do it, and insists that the rotors also need to be changed. I can only imagine what they'll charge. I figured I might at least attempt to inspect...

2016 Prius Two Eco - rear brakes, what am I doing wrong]]> 6 Sun, 19 Apr 2026 18:43:08 +0000 https://priuschat.com/threads/rear-axle-nut-size.259753/ https://priuschat.com/threads/rear-axle-nut-size.259753/ invalid@example.com (Fubar XIII) Fubar XIII On the site where my parts are "in the cart", they offer sockets from 29-35 mm. A quick search said most are 30 mm but I'm not trusting the google or the AI, I want to know from people who know.

Help me, Obi-Wan, you're my only hope.]]> Sun, 19 Apr 2026 18:24:28 +0000 https://priuschat.com/threads/trouble-reattaching-windshield-cowl-back-on-2019-prius-xle.259620/ https://priuschat.com/threads/trouble-reattaching-windshield-cowl-back-on-2019-prius-xle.259620/ invalid@example.com (PierceMD) PierceMD

Hey everyone,

I replaced my struts which required a removal of the cowl under the windshield. My problem now, is that I'm having trouble attaching the plastic cowl to the rubber (what is the name of that?), but when I have, the cowl is sunk under the windshield. The rubber piece doesn't stay up, so there's an obvious gap.

Any information is appreciated.

]]> 1 Sun, 19 Apr 2026 17:32:53 +0000 https://priuschat.com/threads/windshield-cracked-2016-prius.259653/ https://priuschat.com/threads/windshield-cracked-2016-prius.259653/ invalid@example.com (Aboo) Aboo 5 Sun, 19 Apr 2026 15:51:04 +0000 https://priuschat.com/threads/shaking-when-ice-kicks-in.246507/ https://priuschat.com/threads/shaking-when-ice-kicks-in.246507/ invalid@example.com (Aadilish) Aadilish
Shaking when ICE kicks in]]> 23 Sat, 18 Apr 2026 13:56:54 +0000 https://priuschat.com/threads/grooved-rotors.259735/ https://priuschat.com/threads/grooved-rotors.259735/ invalid@example.com (Jacob156) Jacob156 View attachment 293610

I was wondering if it would be worth resurfacing these rotors or replacing them? The brakes are in great shape and they only have 70,000 miles on them. This happened after the car sat in the rain, which caused surface rust on the rotors. After I drove the car these grooves developed. I am pretty sure the rotors aren’t near the minimum thickness. Just wondering if it is worth resurfacing these rotors. The problem is the pads are good so should I use the same pads...

Grooved Rotors]]> 3 Tue, 14 Apr 2026 18:41:16 +0000 https://priuschat.com/threads/losing-coolant.259663/ https://priuschat.com/threads/losing-coolant.259663/ invalid@example.com (Saledet) Saledet
Losing Coolant]]> 10 Mon, 13 Apr 2026 18:22:35 +0000 https://priuschat.com/threads/12v-reading-in-ready-mode-help.259664/ https://priuschat.com/threads/12v-reading-in-ready-mode-help.259664/ invalid@example.com (Edrive) Edrive
I bought a gauge that reads out ecu data like temp, volt, rpm, etc and it is showing that the 12v is dropping all the way to 12.0-12.1v while driving!? Intuitively this feels concerning but maybe someone can help me understand if its normal..

When I FIRST press the brake then hit the start button/ready mode, the gauge reads out 14.1v which seems perfect.. Once I put it in Drive mode/D, the 12v reading...

12v reading in ready mode help]]> 6 Sun, 12 Apr 2026 13:40:31 +0000 https://priuschat.com/threads/wireless-charger-pad-repair.259648/ https://priuschat.com/threads/wireless-charger-pad-repair.259648/ invalid@example.com (Victorio Mo) Victorio Mo anybody tried to replace wi-fi charger pad with some other 3rd party , mine stopped working.
Found some good video how to open it up
TikTok - Make Your Day

Best
Va]]> 2 Fri, 10 Apr 2026 20:50:59 +0000 https://priuschat.com/threads/b1443-prius-2018-base-model.259632/ https://priuschat.com/threads/b1443-prius-2018-base-model.259632/ invalid@example.com (Kenashi) Kenashi
b1443 Prius 2018 Base Model]]> Fri, 10 Apr 2026 09:19:02 +0000 https://priuschat.com/threads/tail-light-dirt-ingress-zigzag-lights.259624/ https://priuschat.com/threads/tail-light-dirt-ingress-zigzag-lights.259624/ invalid@example.com (Prius2016excel) Prius2016excel Tue, 07 Apr 2026 13:03:42 +0000 https://priuschat.com/threads/c1241-and-c1417-2019-prius.259588/ https://priuschat.com/threads/c1241-and-c1417-2019-prius.259588/ invalid@example.com (C Clay) C Clay
Drove it twice, two separate times , 30 minutes of interstate and downtown driving- perfect .

But today I decided to put my Bluetooth dongle and use my app- Scanner App on iOS in it and gave a bunch of codes. So they did the...

C1241 and c1417 2019 Prius]]> Mon, 06 Apr 2026 20:37:10 +0000 https://priuschat.com/threads/looking-for-help-doing-the-heat-exchanger-bypass.259579/ https://priuschat.com/threads/looking-for-help-doing-the-heat-exchanger-bypass.259579/ invalid@example.com (redsprius) redsprius
Thanks in advance.]]> Mon, 06 Apr 2026 15:12:34 +0000 https://priuschat.com/threads/power-outlet-1-front-fuse-location.259558/ https://priuschat.com/threads/power-outlet-1-front-fuse-location.259558/ invalid@example.com (Victorio Mo) Victorio Mo Can somebody help to find 15A fuse location for power outlet #1, which is in a front of console.
Under the hood on the right big box I can see only #2 fuse.

Looking today thru 846 pages of manual pdf, and failed. Too complex...

Thanks all.
Dai]]> 4 Mon, 30 Mar 2026 11:37:20 +0000 https://priuschat.com/threads/2018-prius-business-edition-oil-maintenance.259431/ https://priuschat.com/threads/2018-prius-business-edition-oil-maintenance.259431/ invalid@example.com (xSamuelx) xSamuelx
Recent owner of a 2018 Prius Business Edition - United Kingdom

Before this, I have daily driven an LS400 for the last 10 years, so the fuel efficiency is a welcome change

I have just performed a full service on the vehicle, and I want to reset the oil maintenance. The light wasn't on presently as it is not due. It's a new car ritual for me

Looking online, it suggests going into vehicle settings via the DPAD and accessing the "maintenance system"

However, this is not listed its...

2018 Prius Business Edition - Oil Maintenance]]> 7 Sat, 28 Mar 2026 20:34:08 +0000 https://priuschat.com/threads/intermittent-a-c-issue.259466/ https://priuschat.com/threads/intermittent-a-c-issue.259466/ invalid@example.com (redsprius) redsprius
Intermittent a/c issue]]> Fri, 27 Mar 2026 18:56:33 +0000 https://priuschat.com/threads/gen-4-clean-pistons.259109/ https://priuschat.com/threads/gen-4-clean-pistons.259109/ invalid@example.com (EchoEcho) EchoEcho
2017 Gen 4 Prius 135,000km

I recently had a very slow coolant leak. Eventually found evidence of coolant crust on the thermostat housing where it mounts to the timing chain cover.

However, in the course of ruling out some of the other possible sources of coolant leak I pulled the plugs and borescoped for head gasket. To my horror, cylinder 4 was "steam clean" with very little carbon on the piston, but no evidence of any coolant in the cylinder. Fearing the worst I moved on to the...

Gen 4 Clean Pistons?]]> 10 Wed, 25 Mar 2026 13:51:39 +0000 https://priuschat.com/threads/ac-2-damper-servo-replacement.259424/ https://priuschat.com/threads/ac-2-damper-servo-replacement.259424/ invalid@example.com (Lando Raymonds) Lando Raymonds 1