By NC2020 RX450h
I own a 2020 RX 450h F Sport, which I custom-ordered and received delivery in November, 2019. The SUV is awesome! I installed (myself) the appropriate two hitch, and then had a professional tow/trailer business install the 7-pin tow wiring harness.
My question is regarding backing-up [in reverse] with my small camper attached (being towed behind) by RX. When I towed behind my Prius and needed to backup/in reverse, and the camper attached, the rear sensors kept braking unnecessarily, thinking the Prius was about to hit or strike an object. No matter how slow I backed-up in reverse, the Prius' rear sensors kept activating, causing the vehicle to brake (and display the STOP warning screen).
Can anyone who owns an RX (any year model) who tows, describe how to keep the sensors from braking, when in "reverse" at a slow speed and towing something behind it?
So in the attached image you can see the list of dtcs I have on a 2000 rx 300 AWD
I have tested coils and replaced spark plugs on 2-4-6, all should be in perfect shape.
I have tested unplugging the coils I could easily access with the entire intake assembled, which seemed to not affect the idle, leading me to believe that perhaps those spark plugs in the back are no good.
I am going to head back out now to work on getting to and replacing the 1-3-5 spark plugs, if I can manage.
1. With the intake and throttle body(s?) removed, is it worth any attempt to remove the o2 sensor from above? I tried from below several times, with PB blaster let to sit overnight, to no avail.
2. As I was taking off the intake filter lid, I could swear that one of the two "vacuum" hoses directly behind it, may have been unattached. I followed the one that is attached and it seems to lead to the Fuel Injector rail for 2-4-6. With this logic, would it make sense that the other tube leads to 1-3-5 injectors, and all this could have been from the vacuum leak causing those cylinders to run lean/misfire?
3. Is there anything else I should check while I have the throttle body's off (and cleaned up beautifully) like the MAF, etc? I do have a multimeter, but I have only tried using it a couple of times and am not 100% on which items to check for which values.
4. Is there anyone here with any insight on what values to check on my Code Scanner's "Live Data"? I found a great OBD2 scanner, but I don't know how to use these tools to verify the fix...
My plan now is to replace the 1-3-5 spark plugs, reassemple the intake, verifying all connections are made and see how she runs... but I will work at the o2 sensor or anything else possible, while it's apart.
Thank you if you read this! I am new to the forum, as I just purchased this car for my wife, so thanks in advance, if anyone hears this!