2026-10-08 · 5 min read
Mitsubishi Pajero Sport Lambda Sensor Malaysia — Diesel
4N15 diesel has a wideband lambda sensor (NOx/O2 sensor) upstream of the DPF. Unlike petrol O2 sensors, diesel lambda sensors monitor air-fuel ratio for injection control. Failure causes poor fuel economy and black smoke. Common code: P0190, P0193 (sensor circuit). Diesel lambda sensors are more expensive than petrol equivalents — OEM or quality Bosch/NTK recommended.
Pajero Sport NOx/O2 Sensor (Diesel)
- Diesel 4N15 uses a wideband Lambda sensor (not conventional O2 sensor) for fuel trim and DPF regeneration management
- Lambda sensor fault: P0191 or similar codes — causes poor fuel economy, black smoke, and DPF regeneration failure
- Use genuine Bosch or Denso lambda sensors — diesel sensors are different from petrol O2 sensors; do not substitute