malujerry

iTrader: (7)

So I poured a little Coke (soda!) on the battery terminals (slight greenish buildup) and the problem went away for since 9/30 until 12/14. Light for power steering failure popped up again mid highway yesterday. Did the Coke pour again last night and again no problem today. I just don't get why it goes out once in a while.


For the lights, I drive in the dark often with deers that can pop out of no where. Rather keep my bright LED lights. Besides they were on for 4-5 years with no power steering issues. My ISF definitely doesn't not light up the road like my RX350.

UPDATE: battery ended up being totally dead few days later. Replaced battery, steering wheel fail went away.

iamevan

Just had the power steering fail on me for the first time today -- my 2012 ISF has less than 30,000 miles.

Luckily, I was almost home and turning into my neighborhood when the steering wheel became very heavy. I was in automatic with sport mode off. I'm taking it into the dealership tomorrow to see if they can diagnose and repair it.

After reading this thread, it sounds like the ECU for the power steering is probably to blame, right? Hopefully they will find a code that shows the issue occurred.

iamevan

Update: The dealership wasn't able to duplicate the issue. They said there is no issue with the car -- they weren't able to find any codes. Any tips on what to do next? This obviously is a serious safety concern.

JW2011

Hey iameven, sorry to hear about that. I would try another dealership perhaps, hopefully there's one not too far from you that you can trust or at least heard good things about. Not sure if this would help but I looked up my old invoice, below is what they stated was the cause and Operation number (some internal reference on procedure/ process ??):

Cause:
Power Steering ECU shorted. Internal failure

Operation:
444991

iamevan

Thanks for the tips. Luckily, they took out the car again for a test drive, brought it back into the shop, and found a code. They had to replace the entire steering rack and pinion. It looks like my issue was different from yours. It's definitly not reassuring to see this on a Lexus with less than 30K miles...

Here's what the notes said: