hypervish

This thread might help: https://www.clublexus.com/forums/rx-...and-p1155.html

Use the search function, and you will find much more useful information.

fubass

The search button has helped already, but only so much. The people stating they are having the codes aren't having to get their cars towed for some sensor bs. I really don't know what to make of these codes as everyone else's cars apparently work fine with broken sensors!!!

Lexmex

That P0325 code is the one you want to handle first, the knock sensor (I'd replace both at the same time since they are major PITA to get in there). That knock sensor code never comes up sporadically or temporarily, when it comes on and if you've tried to reset it and it still comes back, there's an issue there that needs fixing. It's quite possible that once you fix that, the other codes won't come on, because the knock sensor can trigger those other codes even if the the other sensors are okay.

salimshah

Keep in mind the CEL are usually related to emission issues and not all problems are reported by codes.

Another tidbit is once a problem is detected, the ecu tries to compensate by controlling other things and in some cases gives up and make the engine go in limp mode.

If you have too many codes, best it to reset and look for the first code to bring the problem in the middle.

The standard rule to repair is, if there is too much labor and and consumeable parts, it is better to over-reach and replace other related parts ... point under consideration is the knock sensor ,,, replace both.

Few things about Lexus/Toyota .. stick with OEM sensors. Stay with Toyota coolant. You can risk things but usually you will run into more trouble down the road.

I agree with you on access issues and there are many reasons behind that. What the engineering design has done (and still doing is) to extend the service interval. I would not be surprised when we get to the point that the whole shell of the vehicle is removed to do one time service at say 100k miles.

Lastly, I sense lot of frustration from the posts. Is it because the repair has been thrust on you? Remember the golden rule for mechanics is patience and perseverance. Lot easier for me to state, but I have needed it too. I generally walk away from the problem and come back after few hours. But the DIY for me is for enjoyment.

Salim

fubass

I enjoy the DIY, its just i had JUST replaced the specific knock sensor and o2 sensor the codes are calling out, not even 140 miles ago. Thats why I'm frustrated.

Carver

Did you disconnect the battery after installing the new sensors? Sometimes it helps to 'introduce" new parts to the ECU.