Crossover with a freshly repainted front bumper and the FCA radar area marked

Hyundai Forward Collision Warning: What an FCA Fault Means and What to Do Next

'Forward Collision Assist blocked' on the dash, an FCA fault that survives a restart, or warnings firing with nothing in front? Forward Collision-Avoidance Assist is the collision side of Hyundai's SmartSense package. It reads the camera at the top of the windscreen, and on radar-equipped cars a front radar in the nose, so a windscreen swap, bumper work or a parking knock you'd forgotten can all put the warning up. Common on the IONIQ, Kona and Tucson. The checks that cost nothing come first; calibration, when your car needs one, is from £162 inc VAT.

Please note

Safe to drive, the auto-brake is off

You can drive the car. With FCA flagged, the car won't warn or brake for you if traffic stops sharply ahead, and whatever shares the faulted sensor tends to drop with it: Smart Cruise Control where it's the radar, Lane Keeping Assist where it's the camera. Normal brakes and steering are untouched. Leave more following distance and treat the assists as not there until it's sorted. Warnings firing at nothing are the case to move faster on: a sensor knocked off its aim can flag hazards that aren't in your path.

What's actually triggering FCA on your Hyundai

Hyundai's SmartSense puts the forward camera behind the windscreen, just in front of the mirror, and on radar-equipped cars a front radar in the nose. FCA reads the camera wherever SmartSense has one, and leans on the radar too where it's fitted, with Smart Cruise Control and Lane Keeping Assist sharing the same sensors. That's why one disturbed sensor can put several warnings up. The triggers, most common first.

The trigger we see most often on radar-equipped Hyundais. A bumper off and back on, a new grille, a repaired wing: the radar moved with the work, even by a fraction of a degree, and the car reads that as a sensor it can't trust, so it flags FCA rather than run the safety system on bad data. The body shop's panels and paint can be perfect and the warning still right, because the calibration is a separate job, and it's the step that gets missed. Sometimes the warning is up before you're home, sometimes it takes longer to surface.

On many Hyundais the camera behind the glass is the sensor doing the forward watching, and it comes off with the old screen. Refitting shifts its aim by enough to fail the self-check, which is why the warning often shows on the way home from the glass fitter, sometimes with a Lane Keeping warning beside it. The fix on those cars is a front camera calibration to Hyundai's documented procedure: £162 inc VAT (£135 +VAT) at a centre.

Trolley contact in a car park, a kerbed nose, a brush on the lower bumper trim: none of it leaves a mark, and any of it can shift the radar's bracket enough to throw FCA. Worth a slow walk round the front end before booking anything. On models where the radar sits behind the badge area, a replacement grille, aftermarket styling or paint over the radar zone can scatter the signal too; if the warning dates from a styling change, putting the original part back costs nothing to try.

New suspension arms or a four-wheel alignment change the car's geometry, and the camera and radar were aimed against the old one. Left alone, the SmartSense systems read the road slightly off-axis, which is how you get lane corrections arriving late, or an FCA alert with an empty road ahead. Camera and radar are aimed as separate systems, and many geometry jobs disturb only one of them; the centre confirms which your car needs in the written quote.

One sensor, several warnings. Smart Cruise Control leans on the same radar FCA does, Lane Keeping Assist on the same camera, and Highway Driving Assist II, where fitted on the IONIQ 5, IONIQ 6, Kona SX2 and Santa Fe MX5, reads the camera and radar together and won't run until each passes its own self-check. It looks like a cluster of faults, but it's usually one cause, and you pay per system calibrated, not per warning.

Packed snow, thick road film or mud over the nose can blank the radar entirely, and the car parks FCA until the view clears; on many Hyundais the cluster says so outright with the 'Clean Front Radar' message. This check costs nothing: clean the front of the car, drive, and if the warning goes and stays gone, there's nothing to calibrate and nothing to book. A message that keeps coming back on a clean car is the aim, not the view.

A real impact can crack the radar's housing or bracket rather than just shifting it, and a calibration won't hold on damaged hardware. A diagnostic scan tells you which case you're in before anything is booked. A diagnostic scan, when your job needs one, is priced and itemised separately. If the radar does need replacing, the new unit is coded to your car for £232.80 inc VAT (£194 +VAT), then calibrated as its own line in the same visit, with the calibration discounted as the second system.

How we fix it

Worth trying first: clean the front of the car, the bumper and badge area on radar-equipped models, and check nothing's been mounted over the nose since the warning appeared. Then think about when it started. A warning that turned up in packed snow or after a filthy motorway run can clear itself once the sensor can see again. A warning that arrived with bumper work, a windscreen swap or an alignment won't: the sensor moved with the work, and the car keeps flagging until the aim is reset.

Still showing? The next step is a diagnostic scan, £54 inc VAT (£45 +VAT), rather than a straight calibration, because an FCA fault has more than one ending: a camera moved by a glass swap, a radar knocked off aim by front-end work, or hardware that's genuinely damaged. A diagnostic scan, when your job needs one, is priced and itemised separately.

From there it's one of three jobs:

  1. The camera's lost its aim. The usual outcome after a windscreen swap, and on SmartSense cars without a front radar the camera is the whole FCA story. It's re-aimed to Hyundai's documented calibration procedure: front camera calibration, £162 inc VAT (£135 +VAT) at a centre.
  2. The radar's lost its aim. The normal outcome after bumper work or a knock on a radar-equipped car. It's a static procedure against a measured target, and calibration runs to full manufacturer specification: front radar calibration, £162 inc VAT (£135 +VAT).
  3. A sensor was replaced. A new radar or camera module is coded to your car before it's aimed, and both steps happen in one visit. Front radar replaced: coding, £232.80 inc VAT (£194 +VAT); the aim is front radar calibration as its own line on top, 35% off as the second system at a centre. The camera below splits the same way. Front camera replaced: £229.20 inc VAT (£191 +VAT). Two or more systems in one visit: the highest-priced system is full price and each additional system is 35% off at a centre.

Every job closes with the paperwork. Certificate to manufacturer tolerances, the same standard dealers issue. Your quote is confirmed in writing before anything is booked. The procedure itself, step by step, is in our ADAS calibration guide.

Hyundai calibration prices

One system is the usual quote here: the windscreen camera or the front radar that FCA reads, whichever the work disturbed. 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)

Coding a replaced part 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 pre-scan, it's £54 inc VAT (£45 +VAT), itemised separately. It reads available fault information; finding the cause may require further investigation. A post-scan is a separate operation.
  • 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).
  • Replacement configuration and calibration are different operations. The work required depends on the vehicle and what the installer has already completed. Configuration prices do not include supplying or fitting a replacement part, or an automatic calibration bundle.
  • Unsuccessful work, further investigation or a return visit may carry charges, including at a service centre. The appointment terms and written quote set out the work and applicable charges before booking.
  • Mobile calibration is available for garages and bodyshops with workshop conditions. Ask us.

Get your Hyundai's FCA calibration booked

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

Because ADAS calibration is a separate job from the bodywork, and it's the step that gets missed. On a radar-equipped Hyundai the front radar sits in the nose, right where the work happened, and its aim moved with the bumper even though nothing looks different. The body shop's panels and paint can be perfect and the warning still right. Clearing the fault code doesn't fix it either: the car re-checks the sensor and puts the warning straight back. The fix is a front radar calibration, a static procedure run to full manufacturer specification: £162 inc VAT (£135 +VAT) at a centre.

It's priced per system, and which system depends on what set the warning off: the windscreen camera after a glass swap, the front radar after bumper work. Front camera calibration 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. A diagnostic scan, when your job needs one, is priced and itemised separately. Your quote is confirmed in writing before anything is booked.

Often, yes. On radar-equipped Hyundais both messages point at the same front radar: 'Clean Front Radar' says the radar can't see, the FCA warning says the car has stopped trusting it, and a radar that's lost its aim can raise either, or both. Cleaning genuinely fixes the blocked case, snow or road film over the nose, and costs nothing to try. When the message won't clear on a clean car, the radar's lost its aim, not its view, and that's a calibration. Our Hyundai 'Clean Front Radar' guide walks through the cleaning-doesn't-fix-it case, most often on the Kona.

No. The job takes a calibration bay, the right target equipment and Hyundai's documented calibration procedure, and that's the setup our service centres run; none of it is franchise-only. Provided the work runs to Hyundai's specification, an independent calibration doesn't invalidate the 5-year warranty under UK block exemption rules. Certificate to manufacturer tolerances, the same standard dealers issue. Dealer quotes for ADAS work run £300 to £900 in quotes customers have shown us.

Because the camera FCA reads sits behind the glass, just in front of the mirror, and it came off with the old screen. Going back on shifts its aim by enough to fail the self-check, so the warning often shows on the drive back from the glass fitter, sometimes with a Lane Keeping warning beside it. Many glass companies fit the screen and end the job there; the remaining step is a front camera calibration to Hyundai's documented procedure, one system on the rate card: £162 inc VAT (£135 +VAT) in a centre visit.

A sensor aimed a fraction off reads the road a fraction off, so the car can flag hazards that aren't in your path. The classic trigger is geometry: new suspension arms or a four-wheel alignment change where the car points, and the camera and radar were aimed against the old set-up. Heavy spray or driving snow can raise the odd alert on a healthy system too, and that passes with the weather. The pattern that points at calibration is repetition in clear conditions, often dating from work you'd stopped thinking about. Camera and radar are re-aimed as separate systems, £162 inc VAT (£135 +VAT) each, and the centre confirms which your car needs in the written quote.

Related ADAS warning guides

The same sensors sit behind more than one warning. If FCA isn't the only thing on the dash, or the trigger was bodywork, these guides carry the detail.

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