Hi, I have a 2009 LR3 V6 Diesel.I'm currently experiencing a suspension default error which turns from amber to red and then indicates not to exceed max speed of 50km/h. When this occurs the ride height indicator and control turns the light off and the control won't raise or lower the car. Usually when I turn the car on and off, the error goes away and the car rides normally for as short as 20min and as long as a few days. When the error isn't present the ride height control works - the car will raise lower normally.

I've checked the OBD errors and found the following errors:
c1a13 -pressure does not decrease when venting gallery
u0132 - lost communication with ride level control module
u0140 - lost communicatio with the body control module
u0421 - invalid data received from ride level control module
b1b70 - local interconnection network bus ciricuit 2
b1b85 - memory control module
b1d18 - volumetric sensor circuit
u0155 - lost communication with instrument cluster conrol module

Any suggestions on where to start, what the root cause of the problem might be, and ballpark cost?

Thank you!

 

Best suggestion is to buy an IIDTool from GAP Diagnostics and re-calibrate your EAS. You may need a new height sensor, too. Check your wiring loom in the front driver's side wheel well as well.

 

Houm_wa is heading you in the right direction. Search the simple/ easily inspected things first. After that, you may need to look at the compressor a little closer. Is the compressor original? Have you replaced the drier recently? A C1A13 code may indicate that the pilot exhaust valve, which is part of the compressor may be sticking. It could also mean the reservoir control valve may be sticking. Either one of these can be disassembled and cleaned with fairly good results.

Let us know how this progresses and let us know what you find out.




Jeff