2010 Lexus RX 450h Hybrid System Issues

[lukeskywalker]

Hi, I have a 2010 Lexus RX 450h with 110,000 miles. A few weeks ago I got system message telling me to check the hybrid system. I took it to the nearest Lexus dealership and they told me it was a bad inverter water pump so I had them replace that. However, it didn’t fix it and I am still getting the message. They said the next step would be to change the inverter, which they quoted me at 7,000-8,000 for. There is no other Lexus specialists in my area and all the local mechanics are telling me they don’t work on hybrid systems.

Ive been looking online for a solution as I am semi mechanically inclined and can do some troubleshooting myself. I have an OBD reader and I pulled of the code P0A93. When researching it online it seems like it could be a couple things.

After they changed the pump I noticed that the fluid didn’t seem to be churning like say the power steering fluid would, but I not sure if it just doesn’t. They also added fluid above the full line so I was wondering if that would make a difference. I also checked a few of the fuses connected to the hybrid system including the pump and they all look good. I also located the vents for the hybrid system and they don’t seem to be covered or clogged.

I just want a second opinion since I have hard time believing its a 7,000 job.

Feel free to ask me any questions, I would greatly appreciate any help.

[Melnric495]

if the error message say the hybrid system is overheating you may have stuff on the floor behind the front seats. There are air vent holes near the floor under the rear seat and anything on the floor back there can block the fresh air needed to keep that system cool