Instrument cluster with several driver assist warnings lit at once

Honda Sensing Fault: Why ACC, Lane Assist and Collision Warnings Often Come On Together

Honda Sensing warning on your Civic, CR-V or HR-V, often with ACC, Lane Keeping Assist (LKAS) and Forward Collision warnings all flagging at once? They share the same forward camera and radar pair, so when those are off, the whole suite goes with them. Here's what's actually triggering it, the aftermarket-glass catch on dual-camera Hondas, and what the calibration costs.

Safe to drive

Safe to drive, but the assists are off

You can drive the car. Honda Sensing covers Adaptive Cruise Control, Collision Mitigation Braking, Lane Keeping Assist and Road Departure Mitigation, and they all stay offline until the system's recalibrated. Normal brakes, steering and conventional cruise still work. Leave more following distance until it's sorted.

What's actually triggering Honda Sensing on your car

Honda Sensing reads from a millimetre-wave radar behind the front emblem and a forward-facing camera at the top of the windscreen. Several Sensing features share both. When one sensor's off, several dashboard warnings flag at the same moment.

Adaptive Cruise reads the radar. Lane Keeping reads the camera. Collision Mitigation Braking reads both. When the radar's aim is off, ACC and CMBS warnings flag. When the camera's aim is off, LKAS and Road Departure Mitigation flag. When both are off, the whole Sensing dashboard lights up. It's still one root cause: a sensor that's lost its aim.

Honda mounts the radar behind the front H emblem. A repaired or refitted bumper, a new grille, even a parking knock that took the bumper off briefly is enough to shift the aim. ACC and CMBS will be the first to flag, often within a few drives.

Civic, CR-V and HR-V Sensing models use a forward camera glued to the windscreen. A new windscreen always moves it, and on the dual-camera variants the alignment between the two lenses also has to be re-established. The calibration is a separate step that most windscreen fitters don't carry kit for.

Honda's published position statement specifies OEM glass for ADAS-equipped vehicles, and aftermarket glass is industry-reported as a frequent cause of Honda Sensing calibrations that won't hold (the dual-camera variants are the most sensitive). Insurers default to aftermarket to keep claim costs down. If your fitter used aftermarket glass and the warnings won't clear, the glass is the first thing to check.

Trolley contact in a car park, a curb strike on the lower bumper trim, a hard parking sensor brush. None of those leave visible damage, but any of them can shift the radar bracket enough to throw the Sensing suite into a fault. Worth a slow walk round the bumper before booking anything.

Newer Hondas (2022 onward on most models) ship with Honda Sensing 360, which adds side radars and a rear camera on top of the front camera-plus-radar pair. The forward suite that runs ACC, CMBS and Lane Keeping is unchanged from the original Sensing. If your fault is on the FCW side, the calibration job is the same on both generations. The side-radar additions don't share the FCW fault.

If the trigger was a real impact rather than a minor knock, the radar housing, the camera bracket, or the supporting wiring may be cracked. Calibration won't hold on damaged hardware. A diagnostic scan tells you which case you're in before any work is booked.

How we fix it

Worth checking first: confirm whether the windscreen was recently replaced and what brand of glass went on. Also look up at the camera bracket from the driver's seat. If the Honda Sensing warning is still showing, both the camera and the radar typically need recalibrating.

On a Honda that means static calibration of the front camera against a manufacturer-spec target board, followed by static calibration of the front radar against a separate radar target. The procedure runs through Honda HDS or a compatible diagnostic platform.

It's a fixed £349 through our network for the radar tier, covering up to three Sensing modules in one visit. The full-system reset is £499 if multiple modules need clearing at once. If the calibration won't hold because the glass is aftermarket, OEM glass under the same insurance claim is the fix, and we supply the certificate as documentation of what was attempted. The full procedure is in our ADAS calibration guide.

ADAS calibration price tiers

Pricing is fixed across our network. Same price wherever you are in the UK. Your tier is set by what work has been done, not by your postcode or your car's make.

Service Price
Windscreen Calibration Static and dynamic methods covered
£199
Radar / Sensor Calibration Covers up to 3 ADAS systems in one visit
£349
Collision Calibration Post-accident realignment
£349
Full System Reset Everything plus DTC clearing
£499

All prices include the diagnostic scan, the calibration procedure (static, dynamic, or both as required), a post-calibration check, and a calibration certificate. No charge for diagnostic if you decide not to proceed.

Get your Honda's Sensing calibration booked

Send your registration and a line on what's happened. We'll come back with the fixed price, the nearest accredited workshop, and the soonest available slot.

  • 80+ accredited workshops, UK-wide.
  • Fixed-fee calibration from £199.
  • OEM-spec calibration. IMI-certified technicians.
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Frequently asked questions

Almost always one. Honda Sensing wires Adaptive Cruise, Lane Keeping, Collision Mitigation Braking and Road Departure Mitigation through the same forward camera and the same front radar.

When one sensor loses its aim, several warnings flag the loss of confidence together. It looks like several faults but it's one underlying cause, and a single calibration visit usually clears them. You only pay one fixed fee.

Honda Sensing calibration sits in our £349 tier, which covers up to three ADAS systems in one visit. That's the front camera, the front radar, and any related Sensing module. If multiple modules need clearing at once after a collision, the Full System Reset at £499 covers everything. Same price wherever you are in the UK.

Because Honda Sensing was designed around OEM glass. The dual-camera variants in particular are sensitive to the optical clarity in the camera zone, and aftermarket glass is industry-reported as a frequent cause of calibrations that pass on the tool but don't hold on the road.

Honda's published position statement specifies OEM glass for ADAS-equipped vehicles. Go back to the insurer with the position statement and ask for OEM glass under the same claim. We supply the calibration certificate documenting what was attempted, which is what most insurers want to see.

No. Any workshop with Honda HDS-compatible diagnostic equipment and a calibration bay can do it, and our accredited network is set up for that. The dealer will charge their own labour rate for the same procedure. The certificate we issue is accepted by insurers and sits on the car's service history.

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