Problem: 2010 Mazda 3 with intermittent check engine light.
Cause: Exhaust oxygen sensor failed and not sending the correct data. Oxygen sensors do wear out. Mazda oxygen sensor replacement is a periodic exhaust system maintenance due to normal engine operation. This is a very common problem and oxygen sensor replacement is a necessary part of emissions control maintenance. Most vehicles have multiple oxygen sensors usually with one located before the catalytic convertor, and another oxygen sensor after the catalytic convertor, and V6 and V8 engines having an oxygen sensor for each side of the engine.
Repair: Check engine light diagnosis. Oxygen sensor replacement. Our auto repair technician scanned the vehicle computer for error codes and was able to confirm the upstream oxygen sensor was not sending the correct data. Remove and replace oxygen sensor. Note: Oxygen sensors typically last the same amount of time. Replacing multiple oxygen sensors as a set will prevent returning for failure of the other oxygen sensors soon after replacing the first failed oxygen sensor.
Tips: Oxygen sensors are a very important part of the engine fuel control and emissions control systems. Besides the greatly increased pollution created by a bad oxygen sensor, fuel mileage will decrease, engine power loss, and other engine parts can be damaged. Ignoring and not replacing an failed oxygen sensor will quick damage spark plugs and the catalytic convertor. Replacing a catalytic converter is a very expensive repair! A check engine light problem should not be ignored.
2010 Mazda 3 with intermittent check engine light problem
2010 Mazda 3 new oxygen sensor replacement. The sensor is located in the exhaust pipe between the engine and the catalytic converter and requires periodic replacement.