Quote:
Originally Posted by J.Seven
My 2000 4.4i has for months the check engine light on. I´m in Africa and there´s no BMW assistance. Car has been running great for the last four years with no critical problems apart from the usual.
Few months ago the check engine light went on and I can feel loss of power at 4500rpm, it strugles a bit to rev after 4500rpm.
Manage to arrange a litle machine that can read the ECU and this is waht is shows:
- 02 sensor circuit no activity detected
- Bank 1 sensor 2
- System to lean bank 1
- System to lean bank 2
There several other information about the engine parameters like MAF and others, but has faults, only these showed up.
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Oxygen sensors monitor air/fuel. If for some reason the computer thinks its getting too much fuel, it may cause the lean situation and why you have problems at higher RPMs.
I would check your oxygen sensors. Maybe got disconnected or just bad. Also check for any air leaks along the intake tract for good measure.