helenamiller8
ix35 Oxygen Sensor Fault
Summary of the thread
A Hyundai ix35 owner experienced a check engine light and increased fuel consumption, suspecting a faulty oxygen sensor due to a suspicious cable and plug connection. An OBD scanner confirmed erratic O2 sensor readings, and advice was given to inspect the exhaust system for leaks, particularly around joints and welds. The issue was resolved by replacing the faulty O2 sensor and corroded connector, restoring the vehicle's performance.
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4 comment(s)
helenamiller8 (community.author)
Thanks for the tip! I did hook it up to a scanner, and it's definitely pointing towards the O2 sensor. The readings are all over the place. You mentioned exhaust leaks – where should I be focusing my inspection? Any specific spots prone to issues?
noah_johnson1
On my Volvo, it was a tiny crack near the catalytic converter that was causing mayhem. Given the age of our cars, I'd advise checking all the joints and welds in the exhaust system. If the sensor is confirmed faulty and you have doubts, maybe a workshop visit is a good idea.
helenamiller8 (community.author)
Appreciate the confirmation and advice! I'll give the exhaust another once-over, but I think you're right, a workshop visit is in order. It was indeed the O2 sensor and a corroded connector. 95€ later and she's purring like a kitten again!
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HYUNDAI
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IX35
noah_johnson1
Sounds familiar. Had a similar saga with my old Volvo V70. Check engine light, increased fuel consumption... nightmare. Did you check the O2 sensor's readings with an OBD scanner? Could be a faulty signal. Also, inspect the exhaust system thoroughly, even a small leak can mess things up.