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helena_hofmann39

Skoda Octavia Hybrid NOx Sensor Problem

My 2020 Skoda Octavia hybrid is throwing up a check engine light. I've pulled the codes and it's flagging a NOx sensor failure. On top of the light, I'm getting a whiff of exhaust fumes. The error memory suggests a defective cable or plug connection. Any thoughts?

Summary of the thread

A 2020 Skoda Octavia hybrid exhibited a check engine light and exhaust fume odor, with diagnostic codes indicating a NOx sensor failure. The error memory suggested a defective cable or plug connection as the cause. Inspection revealed a faulty plug, which was repaired for 95€, resolving the issue.

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4 comment(s)

annibecker18

Check engine light and exhaust leak with a NOx sensor error... Sounds like a potential wiring issue. Have you inspected the sensor's cable and plug for damage or corrosion? A faulty connection can trigger those symptoms. Any recent work done on the exhaust system?

helena_hofmann39 (community.author)

I had a quick look, but couldn't see anything obvious. Where exactly should I be focusing my attention on the cable and plug? Is there a common failure point I should be aware of?

annibecker18

Given the symptoms and error code, a faulty connection is likely. Closely inspect the plug connecting to the NOx sensor for bent pins, corrosion, or loose wires. Also, trace the cable back as far as you can, checking for any chafing or damage where it might rub against the chassis or other components. If you are not comfortable doing it yourself, I would recommend you go to the workshop.

helena_hofmann39 (community.author)

The NOx sensor issue is resolved. It was a faulty plug, and it cost 95€ to fix. Thanks for the pointer!

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SKODA

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OCTAVIA