dieter_storm59
Laguna NOx Sensor Faulty Connection
Summary of the thread
The check engine light on a 2003 Renault Laguna indicated a NOx sensor failure, potentially due to a faulty connection. The issue could stem from a loose or corroded connector near the sensor along the exhaust system. Consulting a workshop confirmed the problem as a faulty connection, which was then repaired.
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4 comment(s)
dieter_storm59 (community.author)
Could you elaborate on the specific location of the connector and any recommended procedures for inspecting it? Are there any specific tools required?
tildabauer1
The connector is usually near the sensor itself, along the exhaust system. Given the exhaust leak, it might be best to consult a workshop. They can properly diagnose if it's just the connection or if the NOx sensor needs replacing.
dieter_storm59 (community.author)
I consulted with a workshop. It was a faulty NOx sensor connection. Repair cost was about 95€ Thank you for pointing me in the right direction.
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RENAULT
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LAGUNA
tildabauer1
I have a Laguna and had a similar problem. The check engine light and the error code related to the emission sensor point to a NOx sensor issue. Did you check the sensor's connection? Sometimes a loose or corroded connector can trigger the error.