OBD-II DTC · SAE J2012
P2003
Particulate Trap Efficiency Below Threshold Bank2
What P2003 means
P2003 is a standard SAE J2012 powertrain diagnostic trouble code with the defined meaning: Particulate Trap Efficiency Below Threshold Bank2. This is the OEM-agnostic definition; specific manufacturer interpretation may add detail (subsystem, bank, sensor location) but the core meaning is consistent across all OBD-II compliant vehicles since 1996.
Can this code be suppressed via ECU tuning?
Common service. After the physical DPF is removed or gutted, ECU-side DPF off is needed to prevent regen cycles and DTC re-trigger. Off-road or motorsport only.