AcuraZine - Acura Enthusiast Community - 3G RDX Problems & Fixes

2019 RDX hesitation on accel

4GeezTL — Sat, 18 Apr 2026 15:48:06 GMT

I have a 2019 RDX with 100,400 miles. Lately the car has been hesitating to accelerate between 40-55 mph under medium throttle. No check engine lights or errors. OBD scanner shows high counts on cylinder 2 but no misfire code yet.

replaced spark plugs about 8,000 miles ago? NGK oem.

today I decided to scope the cylinders with a camera, here are the photos. First pic is cylinder one for comparison, second and third pic is cylinder 2.

Can anyone help me diagnose something from the photos? I notice more sediment in cylinder 2, perhaps fuel injector is failing?

Parking sensor issue

brentyb86 — Sat, 11 Apr 2026 16:39:52 GMT

Hi all,

Recently got a parking system error. I tried disconnecting the battery as well as the 10 second parking system reset method. Nothing working. I hooked up my scanner and the error I got was B2611 - front 2nd sensor failure. Google ai says that is the front inner right. Can anyone confirm this. Also any he full thoughts on a DIY. Can�t seem to find much to anything on this. 2019 rdx spec btw. Any help would be greatly appreciated.

Liquid sloshing sound behind drivers side dash

Rdxaspec — Tue, 07 Apr 2026 02:30:14 GMT

Like the title states, my wife's 2019 Rdx is making a consistent sloshing of fluid sound coming from behind the dash when under hard braking and its especially noticeable when on an incline or decline.

Has anyone else dealt with this?

No sign of water in the vehicle and I've checked the following :

Coolant system for trapped air in the pipes or heater core - none

Took vehicle to a local Honda dealer and they blew out the AC drain line and checked the sunroof and water drains - all seems normal.

They removed A pillar and door panels, inspected under the dash and it all seems dry.

I'm at a real loss here... Have an appointment with acura in a couple weeks to do a deep dive, but I know that's going to be costly.

Any ideas or suggestions would be welcomed! Thanks.