AlanEss Posted August 18, 2023 Share Posted August 18, 2023 My a4 has started throwing too lean error Has got worse over time, now getting dead patches as I accelerate until turbo cuts in. Has anyone an idea what to check for? Quote Link to comment Share on other sites More sharing options...
Steve Q Posted August 18, 2023 Share Posted August 18, 2023 Is it worth you checking the maf, lambda sensor and coil packs/spark plugs first. Quote Link to comment Share on other sites More sharing options...
AlanEss Posted August 24, 2023 Author Share Posted August 24, 2023 I have done the suggested checks and cleaned the MAF with contact cleaner. Now runs more smoothly but still showing same error. This happens miles after the engine reaches operating temperature. I haven't found any leaking air pipes so far. Is there anything that is temperature sensitive? Quote Link to comment Share on other sites More sharing options...
Steve Q Posted August 24, 2023 Share Posted August 24, 2023 Could there be an issue with leaking boost pipes? Quote Link to comment Share on other sites More sharing options...
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