Lane Assist Fault: What's Causing It and What to Do
A lane-assist warning does not prove the camera needs calibrating. Include the exact message, other warnings and any windscreen, suspension or body repairs. Front-camera calibration is £162 including VAT at a centre when that operation is required.
A warning is not a diagnosis
Lane assistance commonly uses a windscreen camera, but an unavailable warning does not identify a failed camera or prove it needs aiming. Visibility limits, installation, wiring and other system faults can matter. Include the exact message and repair history. Do not rely on the affected feature.
What a lane-assist warning means
Lane assistance commonly reads road markings through a forward camera, but its operation can also depend on other vehicle information. Features and sensor combinations vary by model. A lane warning therefore does not identify one faulty component.
Visibility, road markings and weather can limit operation. Glass or camera work can also trigger repair-procedure requirements. A persistent or returning warning needs assessment in the context of the vehicle and its history, not an automatic calibration booking.
Pick your make
Make-specific guides for the cars we see lane assist faults on most often.
- By makeRead more
Volkswagen
Golf, Polo, Transporter. Camera-based Lane Assist across the VAG range; SEAT and Škoda use the same camera hardware.
- By makeRead more
Honda
Civic and CR-V. Honda Sensing's LKAS shares the camera with ACC and Collision Mitigation.
- By makeRead more
Toyota
Corolla, C-HR, RAV4. Lane Tracing Assist is part of Toyota Safety Sense.
- By makeRead more
Nissan
Qashqai and Juke. Lane Departure Warning shares the camera with Forward Collision Warning.
Before you enquire
- 1
Read the exact warning
Follow the warning instructions in your handbook. Photograph the message while safely parked and include any other warnings. Do not rely on an affected assistance feature.
- 2
Describe recent work
Include glass, bumper, suspension, electrical or replacement-part work, and when the warning began. Missing details do not prevent an enquiry.
- 3
Keep earlier findings
Send relevant scan, repair and calibration reports. Do not repeatedly clear codes or test the system by deliberately triggering its warnings.
- 4
Explain practical concerns
Include your location and any unfinished repairs or concerns about driving. Seek qualified advice before travelling if you are unsure whether the car is safe to drive.
Which work may be needed
Tell us whether lane assistance is unavailable, intermittently drops out or behaves unexpectedly. Include recent glass, mirror-area or suspension work and any previous findings. Visibility limitations and an installation or system fault need distinguishing; the warning alone does not establish the cause.
A diagnostic scan reads available fault information. Its findings, repair instructions and any physical checks guide the next step; further investigation may be needed. The centre pre-scan price is £54 including VAT when that operation is required.
Front-camera calibration is £162 including VAT at a centre. Replacement configuration is a separate operation, listed at £229.20 including VAT. It is not a replacement-and-calibration package, does not supply or fit a part, and is not automatically required again if the installer has already completed it.
The vehicle-specific method can involve static work, a prescribed driving procedure or both. Calibration cannot repair damaged hardware, wiring or an unsuitable installation. The quote covers the work identified for your car; unsuccessful work or a return visit may carry charges.
ADAS calibration prices
These are separate service rates, not a diagnosis or a repair package for every lane-assist warning. Prices include VAT, with net amounts alongside. The required work is identified for your vehicle.
Calibration — per system
Coding a replaced part to your vehicle
- 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.
Frequently asked questions
One sensor can support more than one function, while an assistance system can use information from several components. Several warnings therefore do not establish one fault or a particular number of calibrations. Include every message and the complete repair history so the findings can be considered together.
The centre front-camera calibration rate is £162 including VAT when that operation is required. A diagnostic pre-scan is £54 and supplies fault information, not proof of physical alignment. Further investigation, replacement configuration, parts and repairs are separate work. The warning alone does not establish a total repair price.
The appointment length depends on the vehicle, required procedure and condition. Dynamic work can depend on road and weather conditions; faults or unfinished repairs may need attention first. The booking arrangements give the expected timing for your job. Include earlier reports and any time or travel constraints with the enquiry.
Vehicle geometry and preparation can be relevant to calibration, but no universal adjustment rule covers every model. Include the alignment printout, parts changed and repairer's recommendation. A clear dashboard or apparently normal drive does not prove all specified procedures are complete.
Keep the earlier result and describe whether the procedure failed, the warning never cleared or it returned later. Include any subsequent repairs. Repeating calibration is not a guaranteed cure for mounting, hardware, wiring, compatibility or other unresolved faults.
Road markings, glare and weather can limit lane assistance, but the pattern alone does not prove there is no fault. Include the conditions, whether the behaviour changed after repairs and any exact warning. A scan supplies fault information, not a direct measurement of camera aim. Do not rely on lane assistance as a calibration test.
On camera-equipped vehicles, the glass-replacement or camera-removal procedure can require calibration even without a warning. Include the fitting record, whether the original camera was reused and any previous result. A warning after new glass can also involve installation or electrical faults, not just camera aim.
The exact warning and vehicle condition matter. An MOT result cannot be predicted from the assistance message alone; the current DVSA inspection manual covers applicable braking and steering defects. Do not treat an MOT pass as proof of completed calibration. Insurance authorisation and documentation depend on your policy and repair; a calibration record is not a guarantee of claim acceptance.
Book your lane assist calibration
Send your registration and what's been done. We come back with the price, the nearest service centre, and the soonest slot.