Fleet Vehicle Diagnostics Software for UK Businesses
A breakdown rarely happens without warning — the vehicle's own computer usually flags a fault code days or weeks beforehand. FleetGS surfaces those engine fault codes in real time via connected telematics hardware, so problems get scheduled instead of discovered on the road.
From dashboard warning light to fleet-wide alert
Most fleets only find out about a mechanical issue when a driver mentions a warning light, or when the vehicle fails to start. FleetGS turns engine diagnostic data into a proactive fleet management signal rather than something buried in the cab.
Real-time engine fault code alerts
Diagnostic trouble codes generated by the vehicle's onboard computer are surfaced in the fleet dashboard as soon as they're reported.
Problems caught before a driver notices a warning light.
Works with existing telematics hardware
Compatible with RAM Tracking, Teltonika, Geotab, and Webfleet devices already fitted to your fleet, reading data via OBD or hardwired connections.
No forced hardware replacement to get started.
Mileage-accurate service scheduling
Service reminders are based on actual recorded mileage and live diagnostic alerts, not a fixed calendar interval.
Services booked when vehicles actually need them.
Reduced unplanned downtime
Developing faults are flagged early enough to schedule a workshop visit during planned downtime rather than after a breakdown.
Fewer vehicles off the road unexpectedly.
Fleet-wide fault history
Every diagnostic alert is logged per vehicle, building a maintenance-relevant history that supports repair decisions and warranty claims.
A clear record for every mechanical issue raised.
Built on the telematics hardware you already run
- Real-time engine fault code alerts from connected hardware
- Compatible with RAM Tracking, Teltonika, Geotab, and Webfleet
- Mileage-accurate service scheduling, not fixed calendar intervals
- Fault history logged per vehicle for maintenance decisions
- Reduced unplanned downtime through earlier fault detection
- Alerts routed to fleet managers, not left in the driver's cab
- Works alongside app-only tracking for fleets without hardware yet
- Exportable diagnostic and service history for audits
Why fleets add diagnostics to their tracking setup
Early
Fault detection before breakdown
No refit
Works with existing hardware
£45/mo
Starter plan for up to 10 vehicles
Full history
Per-vehicle fault and service record
Fewer vehicles off the road unexpectedly
Catching a fault code when it first appears means a workshop visit can be booked around a vehicle's normal schedule, rather than a driver being stranded mid-route because a developing issue was never flagged.
Diagnostics data works with the hardware you already have
One of the most common concerns UK fleet managers raise about adding diagnostics is whether it means ripping out existing telematics hardware and starting again. In most cases it doesn't. FleetGS is designed to integrate with the tracker hardware many fleets already have fitted — including devices from RAM Tracking, Teltonika, Geotab, and Webfleet — reading engine fault codes and vehicle health data through the existing OBD or hardwired connection rather than requiring a full replacement.
This matters because dedicated hardware is what makes deeper diagnostics possible in the first place. App-only, phone-based tracking gives excellent live location and driving behaviour data with no fitting required, but engine fault codes and similar vehicle health signals need a connection to the vehicle's own diagnostics port that a phone cannot provide. Fleets often start with phone-based tracking for immediate visibility, then add hardware to specific vehicles — typically higher-mileage or higher-value ones — when deeper diagnostics become worth the investment.
For the wider maintenance workflow diagnostics feeds into, see our maintenance feature overview. For fuel-related vehicle health signals specifically, see our fuel management feature, and for the full daily inspection process, read our vehicle inspections feature page.
Flat-rate pricing, no per-vehicle fees
Diagnostic alerting is available on every plan once compatible hardware is connected.
Starter
£45/mo
Up to 10 vehicles
Growth
£129/mo
Up to 40 vehicles
Scale
£299/mo
Up to 200 vehicles
Frequently asked questions
FleetGS's vehicle diagnostics reads engine fault codes and vehicle health data directly from telematics hardware connected to a vehicle's OBD port, surfacing them as alerts in the fleet dashboard rather than leaving them buried in the vehicle's own dashboard until a driver notices a warning light. This includes engine fault codes, battery voltage issues, and other diagnostic trouble codes the vehicle's onboard computer generates, giving fleet managers visibility of developing mechanical problems days or weeks before they cause a breakdown.
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