Real repair · DY13, Worcestershire
Skoda Karoq power tailgate beeping and won't open? It wasn't the strut.
The tailgate unlatched, beeped, and refused to lift. The fix wasn't a new strut. It was one thin sensor wire, snapped in a place nobody looks.
At a glance
- Car
- Skoda Karoq 1.5 TSI, 2021
- Symptom
- Power tailgate unlatches and beeps, but won't lift
- Fault code
- B120A02: Hall sensor signal, tailgate motor 2
- Cause
- Broken sensor wire in the strut loom, under the rubber gaiter
- Fix
- Wire repaired and tested on the customer's drive
- New parts
- None
- Area
- DY13, Worcestershire
The problem: a tailgate that just beeps
The owner pressed the button and heard the latch release. Then came a beep, and nothing else. The tailgate would move by hand, but not on its own.
The fault appeared suddenly, with no knock or warning. On a car like this, the obvious guess is a worn strut. Struts aren't cheap, so a wrong guess gets expensive fast.
Step 1: Scan before you spend
The first job was a full scan with my TOPDON diagnostic tablet. The tailgate control unit had one fault stored: B120A02, Hall sensors in rear lid motor 2, signal malfunction, marked active.
I cleared it, and it came straight back. That meant the fault was present right now, not a one-off glitch. The battery was a little low that morning, but the fault stayed with the car on charge, so voltage was ruled out.
Step 2: Read the wiring diagram, not the forums
Each tailgate strut has its own motor and a pair of Hall sensors. The sensors tell the control unit where the tailgate is and how fast it's moving. Without that signal, the unit plays it safe: it beeps and refuses to drive the motor.
The latch worked fine because it runs from a different module. That narrowed the problem to one place: the sensor circuit on strut number two. No parts ordered yet, and none needed so far.
Step 3: Found it, under the rubber gaiter
The cable from each strut runs through a rubber gaiter and bends into the body. It flexes every single time the tailgate opens and closes. On the Karoq, that bend is a known weak spot.
The gaiter looked perfect from the outside. I eased it back, and there it was: one thin green sensor wire, snapped clean through at the bend. Thinner than a strand of spaghetti, and responsible for the whole problem.
Step 4: Repair it, then prove it
I unclipped one end of the strut for access and spliced in a new length of flexible wire. It has a little slack, so it isn't pulled tight at the bend. Every joint was insulated and wrapped, and the gaiter went back over the top.
Then the multimeter came out. I checked the sensor supply, ground and signal lines at the strut, so nothing was left to guesswork. I moved the tailgate by hand, the control unit saw the sensor pulses again, and the fault cleared itself.
While I was there, the owner asked for the tailgate to stop a little lower when it opens. That's a one-minute setting, so it's done too.
The result
No fault codes in the tailgate module. The tailgate opens and closes on its own again, and the struts stayed where they were.
Tailgate: open. Case: closed. Problem: SOLVED.
Is your Karoq's tailgate doing the same?
Signs to look out for:
- The latch releases, but the tailgate won't lift on its own
- It beeps when you press or hold the button
- It still moves freely by hand
If that sounds familiar, get the wiring tested before you order struts. It's often a broken wire, not a dead strut.
One honest note: this bend works hard on every open and close. A repaired wire can last a long time, but the same spot on either strut can fail later. If it does, I'll explain the options, including a replacement strut, before any work starts.
What the customer said
"Recently had tail gate issues with SKODA KAROQ, found and contacted locally Solved Auto Electrical, technician arrived promptly as arranged. Cannot fault his skills and determination in detecting and rectifying the fault, would recommend and use services if needed in future."
Tailgate, lights or warning lamps playing up?
SOLVED Auto Electrical is a mobile auto electrician based in Kidderminster. I come to you, find the real fault first, and explain the fix before I start. No guesswork, no parts you didn't need.