Air suspension fault

JayRB · Jul 30, 2023

Hi, please can anyone help me how to resolve these fault codes? I have a 2008 3.6 I've checked the controls module by the footwell and it looked fine visually. When I start the car up and try to use the suspension dial I can hear the pump in the boot come on for a few seconds and goes back off again. After plugging in the machine these are the codes I keep getting even though I clear them they come back. Thank you in advance for any feedback.

Codes are:
U0401
U0402
U0403
U0416
U0421
P0480

marjon · Jul 30, 2023

Welcome first off

.

The P0 code is too do with the engine fan I think, so not related which maybe why you haven't included it in your pics.

The others are all coms issue 1s, I often have them but generally ignore . But as you have so many and they come straight back it maybe an issue with your CAN network.
My knowledge of this is slim to none, all I can suggest is that you check the plugs at those modules and ensure they are all clean/dry

Does you reader do live data that you can see what the suspension is trying to do if anything? because that is usually more helpful with diagnosing a problem, (well it is to me).

Does the suspension stay at normal height, but just not allow you to change heights?
Any messages on the screen?

@gstuart has a bit of a handle on how to test CAN and could probably give some tips.

J

JayRB · Jul 30, 2023

marjon said:
Welcome first off .

The P0 code is too do with the engine fan I think, so not related which maybe why you haven't included it in your pics.

The others are all coms issue 1s, I often have them but generally ignore . But as you have so many and they come straight back it maybe an issue with your CAN network.
My knowledge of this is slim to none, all I can suggest is that you check the plugs at those modules and ensure they are all clean/dry

Does you reader do live data that you can see what the suspension is trying to do if anything? because that is usually more helpful with diagnosing a problem, (well it is to me).

Does the suspension stay at normal height, but just not allow you to change heights?
Any messages on the screen?

@gstuart has a bit of a handle on how to test CAN and could probably give some tips.

J

Hi Marjon, Thank you for your feedback. The message I keep getting on the is 'terrain response special programs off' won't allow me to change the height. I've also attached photo of the PO error message. Thank you once again

Air suspension fault

JayRB

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marjon

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JayRB

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