Member Since: 16 Nov 2020
Location: Tricity
Posts: 13
Suspension fault U0421(94)
Hi,
Today when i was driving to work i got U0421(94) fault (invalid data received). I have got this fault in the past but today i understand some rules.
This fault i got when i drive over 60km/h (circ abut on the highway) but in tawn was fine. Today is little bit colder and i have dirty car after off-roading in weekend.
Could you help me which sensor is wrong, or may be where in harness I have to looking deeper?
It is very stressfull becouse it make red lamp so suspension goes down to hard end, so if i will not be able to clear this alarm i will stop on the road becoues on the hard end is imposible to normal drive.
20th Dec 2021 10:26 am
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13895
Hi
What code reader are u using plse, the full code meaning is “ Invalid data received from ride level control module”
Personally would first ensure ur battery is fully charged, should read min 12.5Vdc with the engine off
Then measure the suspensions height in normal ride height , at each wheel, from the centre of the wheel to the bottom of the wheel arches , Fronts 466mm Rear 485mm
Please see how u get on, enclosed some links as well
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