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Old 08-13-2013, 09:15 AM
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Default E53 3.0i EML on multiple codes

BMW X5 3.0i 2003 EML intermittently on/off past months.
I need help to establish true cause of this EML fault.
No obvious symptoms when driving.
Local garage has read and reset fault codes but same codes coming up over time.
238, 239, 240,241,242,243 (This says misfire detected on all cylinders).
202 & 203 This says O2 sensor bank 1 & 2 reached their control limit.
228 227 This says O2 sensors control deviation (whatever that means)

History.
15 months ago EML light on solid caused by perished rubber intake boot. This was replaced along with a routine service where genuine plugs and filters fitted. Vehicle has run some 11 months (10k) without issue till current EML issue these past months. Have checked rubber boot area appears O/K. Have replaced the MAF as this could be a common element but no change to EML fault. What else is common that can cause such codes.


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Old 10-04-2013, 07:52 PM
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verify the throttle valve
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