2026-10-08 · 5 min read
Mitsubishi ASX Oxygen Sensor Service Malaysia
The Mitsubishi ASX 4B10 engine has upstream and downstream oxygen sensors that monitor exhaust gas composition for fuel mixture control and catalytic converter monitoring. A failing oxygen sensor commonly triggers a check engine light and codes such as P0136, P0141, or P0420. Symptoms include increased fuel consumption, rough running, and failed emission tests. Oxygen sensor lifespan is typically 80,000–100,000 km. Replacement is straightforward; always use sensors with the correct connector type for the ASX model year.
ASX O2 Sensor Service
- Upstream (pre-cat) O2 sensor typically lasts 80,000–100,000 km; downstream (post-cat) longer
- Fault codes P0136, P0141, P0131: O2 sensor issues — causes poor fuel economy and potential emissions test failure
- Use Denso or NTK brand sensors for replacement — these are OEM suppliers for Mitsubishi