SimonSTI Posted June 5, 2023 Report Share Posted June 5, 2023 Hi, I've notice that since the last 4 events my lambda are going crazy to 6.X when in full throttle. I double check on the last log from last season in 2022 and they were ok. Not sure when exactly it started but look likes it's after car getting out of winter storage. O2 sensor is on the downpipe and I did change the insulation material over winter (from heat wrap to fancy heatshield material). O2 sensor is from the AEM Uego X serie, bosch 4.9LSU. Anybody with similar experience can confirm it could be the sensor? Other ideas to investigate look at? Map and log available here: 2023-06-05 Lambda issue Screenshots of end of 2022 logs and recent one in this post as well. Quote Link to comment Share on other sites More sharing options...
Adamw Posted June 5, 2023 Report Share Posted June 5, 2023 If the engine appears to be running correctly when the lambda is reading 6.5 then yes I would assume the sensor has failed. SimonSTI 1 Quote Link to comment Share on other sites More sharing options...
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