Booston Posted July 16, 2020 Report Share Posted July 16, 2020 Hi I had erroneous readings of 38afr+ when engine running fine . Is this likely the sensor or the controller? turbo application tia Quote Link to comment Share on other sites More sharing options...
Adamw Posted July 16, 2020 Report Share Posted July 16, 2020 They can read accurately up to 10lambda (147:1 AFR), so 38afr doesn’t necessarily mean something is wrong. Give us a log so we can look for clues. Any chance there is an exhaust leak? Does the wastegate dump back into the exhaust? Quote Link to comment Share on other sites More sharing options...
Booston Posted July 16, 2020 Author Report Share Posted July 16, 2020 Cheers Adam, will pull log but highly unlikely air leak sensor is pre wastegate return and very close to turbo outlet. We saw 138afr on boost ( closed loop disabled while diagnosing ) I have seen over the years sensors can be short lived close to the turbo as see very high heat and yearly replacement possibly likely just a little pocket pain Quote Link to comment Share on other sites More sharing options...
Booston Posted July 16, 2020 Author Report Share Posted July 16, 2020 pcLog 2020-07-16 6;32;43 pm.llg Quote Link to comment Share on other sites More sharing options...
Adamw Posted July 16, 2020 Report Share Posted July 16, 2020 Your log is missing all the diagnostic parameters. Can you go to logging setup, down the bottom of the screen click "add all", then do us another log. Quote Link to comment Share on other sites More sharing options...
Booston Posted July 17, 2020 Author Report Share Posted July 17, 2020 Sorry bud now attached PCLog 2020-07-17 8;16;11 am.llg Quote Link to comment Share on other sites More sharing options...
Adamw Posted July 17, 2020 Report Share Posted July 17, 2020 Ok, I think it is worth trying another sensor, there's none of the normal clues that it has failed though and its pretty unusual for them to read very lean when failed. The Lambda controller appears to be working ok and happy. There is an error reported "low battery voltage", but that happened before the log was started so possibly happened at start up when batt voltage dipped, after that it appears happy. Booston 1 Quote Link to comment Share on other sites More sharing options...
Booston Posted July 17, 2020 Author Report Share Posted July 17, 2020 Thanks Adam much appreciated Quote Link to comment Share on other sites More sharing options...
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