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| E12, E28, E34, E39, E60 General discussion and technical help for all year 5 series cars. |
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01-21-2009, 06:31 PM
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523 E39 problem
i have a hell of a problem with my BMW 523i `97 the motor starts fine etc etc runs great smooth when shes cold (about2-3 minutes) but as the temp rises it runns rough!!! as the temp rises above 1/4 its feels like a misfire bad tickover when you drive its it misses occasionally and can be sluggish at times, loose power, etc... now i do own diagnostics carsoft the error in the dme comes up as 203 lambda regulation limit exceeded oxygen sensor 2 bank 2 cylinder 4-6 202 lambda regulator limit exceeded oxgen sensor 1 bank 1 cylinder 1-3 Also, in Carsoft Live data, comes something like: Lambda sensor 1 heating voltage: 0.7V-4.8v (non-stop fluctuating) Lambda sensor 2 heating voltage: 4.78V (unchangeable and fixed) i have reset the error lots of times and again it comes up when engine is warm(no engine light on ) I`m replaced: CCV, ICV, crankshaft position sensor, spark plugs, all filters, intake gaskets.. and i`m still got the problem. PLease help!!! Last edited by vialle; 01-21-2009 at 06:32 PM.. |
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