Digital cluster showing the crash detection system fault warning

Vauxhall Crash Detection Fault: Why It Appears and How to Fix It

Vauxhall's crash-detection warning tends to appear in full as 'Collision detection risk system fault', and it's a collective flag. Every assisted Vauxhall reads the road through a camera behind the windscreen, cars with adaptive cruise add a radar in the front bumper, and when either sensor's aim can't be verified the car parks Automatic Emergency Braking, Forward Collision Alert and Lane Keep Assist as a group. Bumper repairs and windscreen swaps lead the triggers across the Corsa, Astra, Mokka and Grandland, and the message can follow a flat battery with nothing on the car touched. Free checks first; if the warning outlasts them, a front camera calibration from £162 inc VAT restores the aim.

Safe to drive

Safe to drive, the assists are off

The car stays driveable, brakes and steering are untouched. What's parked is the front-sensing family: Automatic Emergency Braking, Forward Collision Alert and Lane Keep Assist lean on the same camera and radar, so they sit out together until the aim is trusted again. Nothing intervenes for you in the meantime, so keep a bigger gap to the car ahead until it's put right.

What's actually triggering Crash Detection on your Vauxhall

Every assisted Vauxhall carries a forward camera behind the windscreen, up by the mirror, and cars with adaptive cruise add a radar in the front bumper. The warning is a collective one: when either sensor can't verify its aim, the whole front-sensing family goes down with it. Find the trigger that fits below.

The leading trigger on every model in our Vauxhall coverage, Corsa to Combo. A respray, a refitted bumper or a new bracket after a light knock can all leave the panel work looking perfect while the radar behind it ends up pointing somewhere slightly different. The car catches the mismatch on its next self-check and raises the collective fault, because calibration is a separate step the bodywork often skips. Putting it right is a front radar calibration: £162 inc VAT (£135 +VAT) at a centre.

The camera judges distance and lane position through one patch of glass, and a new windscreen changes that view by enough for the self-check to refuse it. The Astra, Grandland and Insignia are the regulars in our coverage for a glass-led fault, though any assisted Vauxhall can do the same. If new glass went in shortly before the warning appeared, book the front camera rather than the radar; the per-system rate doesn't change.

Trolleys, kerbs and bollards all make contact at bumper height, exactly where the radar sits. Corsa owners tend to see it from badge-area knocks, Mokka and Crossland owners from everyday parking contact, and the warning can lag the knock by days, which is why the two rarely get connected. Before booking anything, walk the front end slowly: a scuff on the badge surround or an uneven panel gap is often the only evidence you'll find.

The warning can follow a flat battery or a jump start with nothing on the front of the car touched. Don't book a calibration on the strength of it. The diagnostic scan reads what the car actually logged, and voltage or wiring faults show up there as a different repair, not a calibration. If the scan finds both sensors aimed and healthy, there's nothing to calibrate, and we'll tell you so.

The vans live a harder front-end life: loading bays, kerb contact, delivery mileage. They share their platform and sensors with the Peugeot Expert and Partner, so they're routine work for the network, and the job itself is the same per-system calibration a Corsa gets. Send the registration through the same form, fleet or private.

Vauxhall builds on shared Stellantis platforms with Peugeot, Citroen and DS, so similar front-sensor hardware turns up in similar positions across the group, though each marque words the warning differently on the dash. A 208 or C3 story you've read will map loosely onto your Corsa. The calibration itself always runs to the documented procedure of the maker whose car is on the ramp, and the booking route below covers all four badges.

A genuine impact can crack the radar housing, bend its bracket past adjustment, or damage the camera mount, and broken hardware can't be calibrated back into service. The scan establishes which case yours is before anything goes on a quote. Where a sensor has to be replaced, coding and calibration run together as one job afterwards: £229.20 inc VAT (£191 +VAT) for a replaced front camera, £232.80 inc VAT (£194 +VAT) for a replaced front radar.

How we fix it

Three checks cost nothing and clear a fair share of these warnings. Walk the front end for uneven panel gaps that point to earlier repair work. Clean the glass in front of the camera mount and the nose of the car, because a sensor that can't see reports a fault it doesn't have. Then power the car down completely and restart it, especially if the message first appeared after a flat battery. If the warning stays away, you never needed us.

If it returns, the diagnostic scan comes next, £54 inc VAT (£45 +VAT), always itemised as its own line. One collective message covers several different jobs: a camera that lost its view with new glass, a radar nudged by bumper work, a voltage or wiring fault left behind by a battery event, or a sensor an impact actually broke. The scan settles which before any calibration reaches the quote.

The scan points to one of three endings:

  1. A sensor needs re-aiming. The common result after bodywork or a knock. The centre runs Vauxhall's documented calibration procedure and it prices as one system: front camera calibration, £162 inc VAT (£135 +VAT), front radar the same rate where bumper work was the trigger.
  2. Nothing needs calibrating. Voltage codes from a flat battery, or a connector disturbed during a repair, can raise the warning with both sensors aimed correctly. That's a different repair, and the scan result goes into your written quote instead of a calibration you don't need.
  3. A sensor needs replacing first. Broken hardware won't hold an aim. Once the new part is fitted, coding and calibration follow as one job: £229.20 inc VAT (£191 +VAT) for the front camera, £232.80 inc VAT (£194 +VAT) for the front radar.

Certificate to manufacturer tolerances, the same standard dealers issue. Your quote is confirmed in writing before anything is booked. Our ADAS calibration guide covers what happens during the procedure itself.

Vauxhall calibration prices

Most crash-detection jobs on this page price as one line: the front camera when glass or a camera fault set it off, the front radar when bumper work did. Rates are the same at every service centre, per system, shown inc VAT with the net figure alongside. Your total is confirmed in writing before anything is booked.

Calibration — per system

Service At a service centre
Front camera calibration £162 inc VAT (£135 +VAT)
Front radar calibration £162 inc VAT (£135 +VAT)
Blind spot radar calibration £162 inc VAT (£135 +VAT)
360° / surround camera calibration £162 inc VAT (£135 +VAT)
Reversing camera calibration £206.40 inc VAT (£172 +VAT)
Parking sensor calibration £184.80 inc VAT (£154 +VAT)

After a part was replaced (includes coding to your vehicle)

Service At a service centre
Front radar replaced £232.80 inc VAT (£194 +VAT)
Front camera replaced £229.20 inc VAT (£191 +VAT)
Blind spot radar replaced £226.80 inc VAT (£189 +VAT)
Reversing camera replaced £213.60 inc VAT (£178 +VAT)
  • When your job needs a diagnostic scan, it's £54 inc VAT (£45 +VAT), always itemised as its own line. It shows which systems were live before work started.
  • Two or more systems in one visit: the highest-priced system is full price, each additional system is 35% off at a centre. Scans aren't part of the discount. Front camera and front radar together come to £267.30 inc VAT (£222.75 +VAT).
  • On mobile trade visits only: if the technician attends and the calibration can't be completed, a sensor fitted misaligned for example, a call-out fee of up to £72 inc VAT (£60 +VAT) applies.
  • Mobile calibration is available for garages and bodyshops with workshop conditions. Ask us.

Get your Vauxhall's Crash Detection fault sorted

Send your registration and a line on what's happened. We come back with the itemised quote, the nearest of 80+ UK service centres, and the soonest slot.

  • Per-system pricing, from £162 inc VAT.
  • Your quote is confirmed in writing before anything is booked.
  • Certificate to manufacturer tolerances, the same standard dealers issue.
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Frequently asked questions

Front camera calibration, the sensor every assisted Vauxhall carries for this warning, is £162 inc VAT (£135 +VAT), front radar is the same, with the full rate card on this page. Two or more systems in one visit: the highest-priced system is full price and each additional system is 35% off at a centre. If the scan shows a sensor has failed, coding and calibration after the replacement come to £229.20 inc VAT (£191 +VAT) for the front camera and £232.80 inc VAT (£194 +VAT) for the front radar. A diagnostic scan, when your job needs one, is priced and itemised separately. Your quote is confirmed in writing before anything is booked.

It's the collective warning for the front sensing set: the camera behind the windscreen on every assisted Vauxhall, plus the radar in the front bumper on cars with adaptive cruise. The car won't run safety interventions on a sensor whose aim it can't verify, so Automatic Emergency Braking, Forward Collision Alert and Lane Keep Assist drop as a group rather than one by one. Bumper refits, windscreen swaps, potholes and parking knocks are the usual causes, and the message can also follow a flat battery. Where the scan confirms an aim fault, the fix prices as a single system: front camera calibration, £162 inc VAT (£135 +VAT) at a centre.

Because the code was only the messenger. Clearing it, or disconnecting the battery, resets the dash but not the sensor: the aim the car refused is still the aim it finds on the next self-check, so the warning returns within a few miles. The cycle ends when the sensor is aimed back inside Vauxhall's tolerances and verified, which books as a front camera or front radar calibration, one system, £162 inc VAT (£135 +VAT) in a centre visit.

Yes. The message can appear after a flat battery or a jump start with nothing on the front of the car touched. That doesn't automatically mean a calibration: voltage and wiring faults show up on the diagnostic scan as their own repair, and a sensor that's still aimed correctly has nothing to calibrate. The scan is £54 inc VAT (£45 +VAT), always itemised as its own line, and whatever it finds, calibration or not, goes into your written quote before you commit to anything.

Broadly, yes. Vauxhall shares its Stellantis platforms with Peugeot, Citroen and DS: the Corsa sits alongside the 208, the Astra alongside the 308, and the Vivaro and Combo vans alongside the Expert and Partner. Similar sensors in similar positions fail for the same handful of reasons: bodywork, knocks, and hardware that's blocked or broken. What changes is the wording on the dash and the procedure the work runs to, which is always the documented procedure of the maker whose car is being calibrated. Send your registration and the quote comes back naming the exact systems your car carries.

No. The job needs the right targets for your model, a controlled space to run them in, and Vauxhall's documented calibration procedure, and that's what our service centres are equipped for. UK block exemption rules let independent workshops carry out warranty-safe service and repair work, calibration included, provided it's done to the manufacturer's standard. Certificate to manufacturer tolerances, the same standard dealers issue. The dealer route for the same calibration runs £300 to £900 in quotes customers have shown us.

Related ADAS warning guides

Vauxhall's crash-detection warning usually traces to the windscreen camera or the front radar, and the two most common routes into it each have a full cross-make guide.

  • Forward Collision Warning Fault

    Collision and crash-detection warnings under every maker's name for them: the cross-make walkthrough of the whole family.

  • ADAS calibration after windscreen

    New glass in front of the camera is a leading trigger on this page. The full guide to camera calibration after a windscreen replacement.

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