C219 CLS55 and CLS63, 2004-2010

Parking Sensor Issue

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Old Nov 19, 2022 | 10:30 AM
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2005 CLS55 AMG, 2006 Range Rover Sport Autobiography
Parking Sensor Issue

Hi All, my parking sensors have stopped working on my CLS55 AMG. Code reader is throwing up error: 9091 "the driver a failure, even though PTS is not defective(eg, car wash, pneumatic drill or traffic light induction loops). This makes no sense.
The live data stream shows the rear sensors are reporting ok, the front sensors aren't and are all reading the max 2.55m.
When turning the sensors on the warning tone sounds and the front and rear distance display lights show 4 red lights each.
Does anyone know what the problem might be?
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