OBD-II Hardware Integration

OxMaint integrates with virtually all OBD-II telematics devices and providers including Samsara, Geotab, Verizon Connect, Teltonika, Zubie, and many others. We also support Bluetooth OBD adapters based on ELM327 and STN1110 chipsets. For heavy-duty commercial vehicles, we support J1939 protocol devices. If your telematics provider offers API access to vehicle data, OxMaint can likely integrate with it. Our open API architecture means you're never locked into a single hardware vendor.

DTCs are standardized 5-character codes (like P0171, P0420, P0300) that vehicles generate when their onboard computer detects a malfunction. The first letter indicates the system (P=Powertrain, B=Body, C=Chassis, U=Network), and the remaining digits pinpoint the specific issue. There are over 5,000 possible DTCs. OxMaint automatically decodes every DTC into plain language, classifies it as Critical, Warning, or Pending, and can trigger automatic work orders for critical codes. We also capture "freeze frame" data—the exact conditions when the fault occurred—to help technicians diagnose issues faster.

OxMaint's AI analyzes patterns in OBD-II data across your entire fleet to detect anomalies that precede failures. For example, subtle changes in voltage patterns can predict battery failure 5-7 days before it happens. Irregular fuel trim readings can indicate an impending sensor failure. The AI learns what "normal" looks like for each vehicle and flags deviations. It also incorporates maintenance history, age, mileage, and operating conditions to estimate remaining component life. This allows you to schedule repairs during planned maintenance windows rather than experiencing roadside breakdowns.

Yes. Heavy-duty vehicles (over 14,000 lbs) use the J1939 protocol, which is supported through our integration with devices like Teltonika's FMx003 series and other J1939-compatible telematics. These devices access FMS (Fleet Management System) data specific to commercial trucks and buses, including additional parameters like axle weights, transmission data, and specific heavy-duty DTCs called SPNs (Suspect Parameter Numbers) with FMIs (Failure Mode Identifiers). OxMaint decodes all J1939 fault codes just like standard OBD-II codes.