Hybrid Technology Unique topics related to the 2004 -2009 RX400H model hybrid drivetrain and other features/options found only on the RX400H. Please use the main forum for discussion about shared components with other second generation RX models.

Leak in the hybrid cooling - Check Hybrid System message

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Old 07-27-19, 09:07 AM
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professorm
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Default Leak in the hybrid cooling - Check Hybrid System message

I was driving today and my Check Hybrid System message came on. It then briefly flashed coolant hot message. I pulled over and saw that the Hybrid coolant tank was empty. I added some water and drove to the next exit and pulled off. The coolant level didn’t drop much with the 2 mile drive.

I remember reading on here about a common issue with leak in the Hybrid system, but with a quick search, I couldn’t find much info.

The car drove fine. The hybrid engine was working and I saw the Hybrid power meter moving like normal. I was going to check the regular battery.

The vehicle is a 2006 RX400H.

Last edited by professorm; 07-27-19 at 09:10 AM.
Old 07-27-19, 07:19 PM
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Okay, it turns out that the hybrid radiator is cracked. When I go on rock auto, I can’t differentiate the hybrid radiator from the ICE radiator. Can anyone help?

EDIT: My mechanic found that a rock hit the radiator and cracked it. New radiators are ~$500. He took my radiator to get it repaired, and the repair ran about $90. Much cheaper than a new radiator. I am back up and running now.

Last edited by professorm; 08-19-19 at 08:01 PM.
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