27F battery is a good way to up the amp-hours without upping the $$$ significantly.
SOLVED Help with AHC stuck in low position (5 Viewers)
- Thread starter ranma21
- Start date
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.
an Interstate group 31 Fits fine in a 200 stock battery tray
I have a 2015 LX570, just did a bleeding of AHC fluid and end up with same symptom as yours. searching on internet lead me to this thread. just ordered ELM327 OBD2 adapter, will load Torque Pro once I get the adapter. Hope just need to clear the error code caused by fluid low during bleeding. How’s your AHC system been working since the time you fixed the problem?
Wow! Didn’t expect such a quick reply, Thank you so much!
What year is your LX and miles? Any record of previous fluid change? Just curious.
It’s a 2015 with 91k miles. there was one previous owner, probably didn’t service at Lexus dealership because there is not much Carfax records.
I am changing all the fluids except for transmission fluid now, will do the transmission at 100k miles. it will continue to have no new Carfax records as I will DIY and not go to a dealership to do the maintenance. but now I will know exactly what have been changed what what fluid was used.
Same story here. I'm second owner but first owner went to Lexus until the factory maintenance expired then did all the service at Toyota after that. Called the Toyota for service records and they never touched AHC.
I just got the same error message as in this thread. Coincidentally on the way home from the dealer, which did an AHC fluid change, among other things.
My battery is from 2018, and has significant corrosion on both terminals. I do suspect it needs to be replaced. Might have to do it sooner than later now.
The AHC stuck in low when I got the AHC error message. After making sure the AHC reservoir is almost full. I drove it for a few miles and left the car in garage. The next day it drove it again. Then after a few days sitting in garage I noticed AHC is at normal height. In that few days I did start the car a few times working on other maintenance work but didn’t pay attention to the AHC position. before driving the car in low height position I also tried to clear error using some cheap OBID2 software that didn’t recognise AHC system. From reading this thread, I knew that the AHC stuck in low because the AHC pump does not start when this code is present. Clearing the code and/or driving the vehicle in low AHC position to certain speed might have forced the pump to work. After that, the AHC works fine and I never see that AHC error code again. I suspect disconnecting battery for some time might also clear the error code but I haven’t tried that.
Mine seems to be stuck in low now, too.
This is what my reservoir looks like:
Can't for the life of me tell the exact level of the fluid.
Like you, my Actron OBD2 reader did not pick up any error codes, and was not able to clear this code.
I did just disconnect the battery and will give it 20-30 mins.
Put a headlight at top of the spare tire facing the fluid reservoir, you will see the level. I filled it almost full well above max level when the car was stuck in low. Once the car is back at normal height, the fluid level fell to in between max and min marks.Mine seems to be stuck in low now, too.
This is what my reservoir looks like:
Can't for the life of me tell the exact level of the fluid.
Like you, my Actron OBD2 reader did not pick up any error codes, and was not able to clear this code.
I did just disconnect the battery and will give it 20-30 mins.
The word is "brake" for God's sake...
Can anyone confirm if unplugging the battery for a while will clear the AHC codes? Or is Techstream needed?
Similar threads
