Diesel emissions & aftertreatment
High soot, repeated regens, SCR/DEF faults and derates need system-level diagnosis — not automatic parts replacement.
High soot load, regeneration that takes too long or will not complete, DPF/SCR/DEF fault codes, derates, NOx or temperature sensor faults and aftertreatment communication problems.
We review live data, pressure and temperature information, sensor plausibility, soot calculations and system behavior before recommending components.
When appropriate, we perform service procedures, soot resets or regeneration-related work and verify that the system responds correctly afterward.
A DPF warning can be the result of a sensor, wiring, fuel, air, temperature, pressure or control problem. GCP diagnoses the system instead of treating every warning as a bad filter.