2026-10-08 · 5 min read
Nissan Sylphy O2 Sensor Malaysia
Sylphy MRA8DE has upstream (wideband air-fuel ratio sensor) and downstream (catalyst monitor sensor) O2 sensors. Common codes: P0135 (upstream sensor heater fault), P0420 (catalyst efficiency — often the downstream sensor or an ageing catalyst). Malaysia RON95 petrol and city stop-start driving contribute to sensor fouling over time. OEM Denso sensors are the safest replacement choice; cheap generic sensors may cause fuel trim instability. Inspect at 20,000 km; replace at fault code indication.
Sylphy Oxygen Sensor
- Upstream and downstream O2 sensors control fuel trim — replace if reading erratically
- Typical lifespan: 80,000–120,000 km
- Use Denso or NGK OEM-spec replacement sensors
- Bad O2 sensor: rich running, high fuel consumption, occasional misfires, CEL P0130–P0167