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marthaschmitz13

Endeavour Oxygen Sensor Issue

I'm having trouble with my 2009 Ford Endeavour with a gasoline engine, around 74031 km on it. Lately, the check engine light keeps popping up, and the error is related to the oxygen sensor. I've also noticed my fuel consumption has increased. The cable and plug connection to the sensor look worn. Has anyone else experienced something similar?

Summary of the thread

A 2009 Ford Endeavour owner experienced a check engine light and increased fuel consumption, linked to an oxygen sensor issue. The problem was suspected to be due to worn cable and plug connections. It was advised to inspect the wiring and connectors, but ultimately, a professional diagnosis was recommended. The workshop confirmed the faulty oxygen sensor, replaced it, and cleaned the connections, resolving the issue and restoring normal fuel consumption.

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4 comment(s)

jana_dragon90

I had a similar issue with my Endeavour, though I can't recall the exact year. The oxygen sensor, also known as a lambda sensor, plays a critical role in monitoring the exhaust gases to ensure optimal fuel efficiency. The symptoms you describe – the check engine light and increased fuel consumption – strongly suggest a problem with the sensor or its connections. It's important to resolve this promptly, as a faulty sensor can negatively impact your engine's performance and emissions. Has the error code specified which sensor is at fault?

marthaschmitz13 (community.author)

The error code just said 'oxygen sensor circuit malfunction'. It didn't specify which sensor it was. Is there a way to check the sensors myself, or is it better to just take it to a workshop?

jana_dragon90

Given that the error code is rather generic and you suspect a connection issue, a thorough inspection of the wiring and connectors is worthwhile. However, without specialized diagnostic equipment, pinpointing the exact cause can be challenging. Considering the potential impact on fuel efficiency and emissions, I'd recommend consulting a qualified technician for a comprehensive diagnosis. They possess the necessary tools and expertise to accurately identify the problem and implement the appropriate solution.

marthaschmitz13 (community.author)

Okay, I took it to the workshop, and you were right, it was the oxygen sensor. They replaced it, and also cleaned up the connections. Cost me 95€, but the check engine light is gone, and fuel consumption seems back to normal. Appreciate the help!

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FORD

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ENDEAVOUR