Jimny O2 Sensor Failure Impacts Fuel Usage & Power

Having faced a similar issue with my 2016 Jimny, I can share my experience as someone with moderate experience in car maintenance and repairs. The symptoms you describe match exactly what I encountered, increased fuel consumption and check engine light due to a malfunctioning oxygen sensor. Initial sensor testing revealed the heater element wasnt working properly, but the real culprit turned out to be a damaged cable connection to the sensor. The workshop first performed a complete diagnostic scan and tested the oxygen sensor functionality. They discovered the connection between the sensor and the main wiring harness was corroded, affecting the heater element operation. The repair involved cleaning the connectors and replacing a section of wiring, costing 95€ and taking about 2 hours to complete. Before suggesting more specific advice, could you share: The exact error code you received, Whether you notice any exhaust smell, If the problem occurs more during cold starts, Your current mileage This information would help determine if your issue matches mine or if other vehicle emissions components might be involved. My suggestion would be to have a professional diagnose the exact nature of the sensor failure before replacing any car components, as false readings can sometimes be caused by wiring issues rather than sensor failure.

Last serviced 3 months ago at 48000 KM and experiencing similar issues with the exhaust system. The malfunction indicator is indeed showing the same error code P0141. Glad to hear your fix was relatively straightforward. I had the sensor testing done yesterday, and they confirmed the oxygen sensor heater circuit was faulty. The check engine light started appearing intermittently before becoming constant. Workshop quoted 280€ for parts and labor, which seems higher than your repair cost. Just wondering if cleaning the connectors might solve the issue in my case as well, before committing to a full sensor replacement. The mechanic mentioned the wiring looks fine, but I will ask them to double check the connections.

Your experience with the wiring fix is definitely worth considering here, but given the confirmed heater circuit fault and different symptoms, we might be looking at a different root cause. In my case, the intermittent issues were clearly linked to the corroded connections, while your constant check engine light suggests a more definitive sensor failure. The 280€ quote for a complete oxygen sensor replacement, including labor, is actually reasonable for our vehicle model. The heater element in these sensors typically fails around 45000-55000 KM, which aligns with your mileage. While cleaning connections helped in my situation, the workshop is probably right about needing a full replacement if they have already verified the wiring is intact. The air-fuel ratio control depends heavily on properly functioning oxygen sensors, and a faulty heater element can significantly impact the vehicle emissions system performance. If you want peace of mind, you could request they test the connections one more time, but based on the diagnostic results and my experience with these car components, proceeding with the sensor replacement might save you from future issues and continued high fuel consumption.

Thank you for the additional details about my situation. After considering the consistent malfunction indicator signals and the confirmed oxygen sensor heater circuit fault, I will proceed with the full sensor replacement. While the 280€ cost is higher than your wiring fix, it makes sense given my mileage and symptoms. The air-fuel ratio issues and increased fuel consumption have become quite noticeable, and I want to avoid any further vehicle emissions problems. The workshop has already verified the wiring, so I will schedule the repair for next week. I appreciate you sharing your experience with the similar check engine light issues. Even though cleaning the connections worked in your case, my constant error code and diagnostic results point toward needing the complete sensor replacement. Better to fix it properly now than risk ongoing problems with the emissions system. Will update once the repair is completed in case anyone else encounters similar sensor testing results with their vehicle.