2024 California Ocean 6.1 – Front middle-left sensor always red + loud beeping when slowing down (but works fine when stationary?)

[atokodi]

Hi all,

I’m trying to figure out a weird issue with my 2024 California Ocean 6.1 and I’m hoping someone here has seen something similar.

The issue​

When I slow the car down, the front assist / parking sensor system behaves strangely:

• The front middle-left sensor always goes red
• It starts beeping loudly every time I decelerate or creep forward
• This happens even when:
  • The bumper/sensor area is clean
  • There is nothing in front of the car
  • No visible obstruction at all

What’s confusing​

When the car is fully stopped, everything seems normal:

• If I manually enable the parking sensors while stationary:
  • All sensors work correctly
  • No constant red warning
  • Distance detection is accurate
  • Pedestrians walking in front are detected properly

So the system itself clearly works — just not during low-speed movement / braking.

What I’ve checked so far​

• Sensor is clean (no dirt, ice, water, etc.)
• Nothing physically blocking the bumper
• Issue is always the same sensor (front middle-left)
• Works fine in stationary mode
• Problem only appears when the car is rolling slowly / slowing down

My questions​

Has anyone seen this behavior before?
I’m wondering if this could be:

• A faulty ultrasonic sensor that only fails under vibration/motion
• A loose connector or wiring issue behind the bumper
• Calibration issue between parking sensors and front assist system
• Software glitch during deceleration (sensor fusion issue?)

Any advice appreciated​

Before I book a service visit, I’d like to narrow down whether this is:

• A known software bug / reset fix
• Or something physical with the sensor or wiring

If anyone has had similar symptoms or knows what to check next, I’d really appreciate the help.

 

[atokodi]

Also AAC is disabled. Could it be related?

 

[FWhite]

I have no direct experience in VW, since mine doesn't have front sensors, but FWIW on my Mercedes I had a similar problem with the license plate frame that was vibrating and upsetting the sensor that was nerby (not in front of it).

 

[StratosFearXX]

Is it lowered @atokodi? Mine is (60mm, GTT bumper) and the front sensors can spot a small insect at 20 paces, so I turned 'em off in the head unit.

 

[atokodi]

Everything is stock, it's whatever the car came with from the factory.

 

[TeeCeeJay]

Probably a stone has hit the sensor and broken it's sensitive internal ultrasonic workings. Had the same issue on a Golf a few years ago. Replaced sensor fixed it.

 

[atokodi]

@FWhite got it—thank you! I honestly would have never guessed that.