2009 BMW 328i Convertible - Answered Questions & Fixed issues
Ac is not turning on
some a/c will not work unless the blower fan is also on check for power to the compressor clutch when all is on. There is a pressure switch at the receiver dryier That little round black cylinder next to the condensor in front of the radiator It is used to stop the compressor if there is too much pressure or not enough gas. If it is working then the system needs looking at if not there will be no power when the a/c is switched on
E46 328i year 1999 diagram for e box fuses
https://blog.bavauto.com/5677/bmw-e46-3-series-engine-electronics-fuse-pack-in-underhood-e-box/
Fuse 1 - 30A - DME, Injectors, SMG Hydraulic unit
Fuse 2 - 30A - DME, Idle control valve, Fuel tank ventilation valve, Fuel pump
Fuse 3 - 20A - E-box fan, Transmission RPM sensor, Camshaft positioning sensors, Mass airflow sensor, Fuel pump relay, Secondary air pump relay, A/C Compressor relay, Fuel tank leakage diagnostic module, SMG selector lever
Fuse 4 - 30A - Oxygen sensors and oxygen sensor heater circuits.
Fuse 5 - 30A - Fuel injector relay.
1998 bmw 328i 02 sensors connectors
bank 2 sensor 1 is a heated oxygen sensor in the manifold or exhaust before the cat converter
it is not an o2 sensor which is oxygen sensor after the cat converter for bank 2
two completely different sensors
the fuel trim code appears because of the problem sensors
the fuel trim is cpu program in the computer in the ECM setting a optimum fuel /air ratio after a period of driving
if the sensors both HO2s and O2 sensors are faulty then the cpu cannot set the fuel trim
My 2000 bmw 328i won't stay running. i crank it up and about 3-4 sec later it shuts off can any give advice
Hi Vlad
This sounds like fuel pump problem, or maybe even a fuel blockage in the filter, as what might be happening is when you trun over the car a small amount of fuel is getting through and then running out quickly and not keeping it running, so either the fuel pump has an intermittent fault and only runs for a short time and stops, or your fuel filter may be blocked and needs replacing, to find out if your fuel pump is ok, turn the key so the lights come on on dash but dont run it, go to the rear of the car and listen to see if you can hear a humming noise, what might be better to do is get someone to be at the back to listen as you turn the key, or get someone to turn the key while you listen, if you hear the pump hum, then that will be ok and then you might have to change the fuel filter. this is what it could be, however there may be other things involved, but that would be a good place to start.
Hope that helps
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