How to Replace an Oxygen Sensor — 2020-2025 Toyota Corolla

Replacing an oxygen sensor on your 2020-2025 Toyota Corolla is crucial if you're experiencing poor fuel economy, rough idling, or a check engine light with codes like P0138 or P0158. This DIY repair can save you big, costing between $50-$100 for parts compared to $150-$300 at a shop. With the right tools and this guide, most DIYers can tackle this job confidently in under an hour. DIY Cost: $50-$100 | Shop Cost: $150-$300

You’re done. Clear any stored codes with your scanner and complete a normal drive cycle so the vehicle’s readiness monitors reset.

If the code returns, the root cause likely wasn’t the part you replaced — go back through the diagnostic steps before swapping anything else.