AHC Raising the Rear a lot

[Hokie LX]

Can anyone tell me why my truck has started raising the rear whenever I start the truck? I took the truck on a 1400 mi road trip over Christmas and loaded it up quite a bit with luggage and stuff. It's been doing it ever since. Before the trip, it had never done this...

If I drive it a bit and then put it in park, it'll go back down after 5 seconds or so. Otherwise it goes down while driving eventually.

This is how high it goes up. Height control set on Neutral.

 

[camino70]

Rear height sensor damaged?

This thread mentions:

Summary:
89407-60010 Rear Sensor ASSEMBLY including linkage $250-$300
Dorman 924755 SENSOR ONLY (as pictured in images in posts above) $55
-leej

AHC, back really high

jonathn also mentions cleaning and slightly bending the fingers, probably worth a shot.

 

[JayM]

Ahhh, brings back memories when that was the style. Flip those BFG's around letters out and you will be set!

The solution has been posted above.

 

[Hokie LX]

Thanks guys. I had a feeling it was the sensor but wanted to see what resident experts thought in case there was a cheaper solution/possible cause that I was overlooking.

 

[Bardiya]

I don't see the problem here

 

[JETTIX2]

Rear AHC sensor is bad. Happened to my 05. Came Outside one morning and the rear was sky high

 

[JayM]

Don't be afraid to just go with it and start a new trend. Put some 38's on the back and loosen up the front Tbars and cruise. Or pull out all the stops and go this route:

 

[Hokie LX]

Don't be afraid to just go with it and start a new trend. Put some 38's on the back and loosen up the front Tbars and cruise. Or pull out all the stops and go this route:

I actually kinda like that. I'll start this trend if it'll kill this one! I'd rather my truck ride with the rear high than this...

 

[JayM]

I actually kinda like that. I'll start this trend if it'll kill this one! I'd rather my truck ride with the rear high than this...

View attachment 1389907

Um...oops, I just, I mean, well....hmmm. At least Joe will be able to feed his kids tonight.

 

[Hokie LX]

I think I'm going to take it apart and try and see if I can clean the sensor/springs and use some dielectric grease to seal it back up. Worth a shot before springing for a new sensor.

 

[Hokie LX]

So I took the sensor apart and the spring were pretty corroded and shot. There was a fair bit of water in the sensor as well. Picture below. One spring broke into 4 pieces as I tried to remove it. I salvaged a spring from a ballpoint pen and put that in and now my truck is back to normal, if only temporarily.

I did some searching and it seems that the height control sensors are the same as those used in Toyota's headlight leveling system. I ordered a Dorman 924755 sensor to replace mine. I will be sealing all 3 of mine up as well to prevent further corrosion.

This is the prius headlight sensor:
2004-2009 Toyota Prius Headlight Level Sensor - Body Electrical - Standard Motor Products, Rear Left 04-09 Prius Headlight Level Sensor - 18054-05523039 - PartsGeek

This is what I bought...
Amazon.com: Dorman 924755 Headlight Sensor: Automotive