snwyrvr Posted February 4, 2022 Share Posted February 4, 2022 I have a 2008 rx 400h with 225,000 miles on it. I was getting Maintenance Required light off and on for a month and had planned to take it in but this week there was also a message to check hybrid system. That went away after a day and the maintenance light came back solidly. I took it in to my repair shop today and they put 3 code readers on it but can’t solve the issue. The read out is U0009 and they think it might need a hybrid control unit and they told me to take it to the dealer for a better reading. Have any of you experienced this? And does the replacement unit have to be programmed by the dealer or can my repair shop do it. Thank you. Quote Link to comment Share on other sites More sharing options...
RX400h Posted February 5, 2022 Share Posted February 5, 2022 I once had a similar warning so I checked the battery and found one cell's water level lower than the others. So I added distilled water, charged the battery and never saw the message again. That was 4 years ago. The maintenance required light is typically set to come on, 5000 miles after the last oil change. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.