3rd Car & here we go again with the O2 sensors!
- Thread starter Z8Cookie
- Start date
I've never had a problem with my O2 sensors, so in the spirit of Xmas would be willing to do a straight swap.
More seriously, how often does it get driven & how far, because with only 22k on the clock sounds a bit of a garage queen. Good excuse to go on a long road trip.
More seriously, how often does it get driven & how far, because with only 22k on the clock sounds a bit of a garage queen. Good excuse to go on a long road trip.
Where do you fill up? Always at the same garage?
Use Super Unleaded?
Our old 330Ci was quite fussy about what it drank.
It also threw the emissions light if you pressed the throttle while starting.
I'm sure that after your third car with the same issues that you've already swapped petrol stations etc, but the throttle press while starting took me a couple of years to notice, and another few weeks to stop doing it!
Use Super Unleaded?
Our old 330Ci was quite fussy about what it drank.
It also threw the emissions light if you pressed the throttle while starting.
I'm sure that after your third car with the same issues that you've already swapped petrol stations etc, but the throttle press while starting took me a couple of years to notice, and another few weeks to stop doing it!
It always gets BP ultimate. it's a daily drive bought in late 2012 with just 5K on it, it's had some good runs as well. Perhaps it didn't like the nice new set of 8 carbon fibre badges I fitted to it for its Christmas present. :wink: oh, and I never touch the gas when starting it.
Try shell vpower nitro for the next three tanks. Just elimination but you never know.
I've had both mine replaced,the car doesnt like short,stop/start journeys at all I always let mine warm up for 10 mins before I go to work coz I only do a mile before I stop at a shop. I find this helps immensely especially on the 2nd start up coz the engine is warm then and the cold start/richening valve doesnt squirt too much in and flood the engine. When this happens the lights on dash come on and the engine revs itself and you cant drive it with a heavy smell of petrol. Switch off for few minutes and its ok then.
Still not fixed this yet, but I have noticed it always comes on about 2 minutes after starting the car then it's fine for the rest of the run. Wonders if could have anything to do with the EMISSION CONTROL-AIR PUMP? Don't these only run for about the first 2 minutes then shut off?
Any thoughts Guys?
Part link http://www.realoem.com/bmw/showparts.do?model=DU92&mospid=49422&btnr=11_3866&hg=11&fg=50
Any thoughts Guys?
Part link http://www.realoem.com/bmw/showparts.do?model=DU92&mospid=49422&btnr=11_3866&hg=11&fg=50
Vincent_Schweiz
New member
Z8Cookie said:
In my S54 documentation (source BMW training program) I could read:
"Secondary Air Injection is required to reduce HC and CO emissions while the engine is warming up. Immediately following a cold engine start (-10 to 40°C) fresh air/oxygen is injected directly into the exhaust stream. The temperature signal is provided to the ECM by the Air Temperature Sensor in the HFM. The ECM provides a ground circuit to activate the Secondary Air Injection Pump Relay. The relay supplies voltage to the Secondary Air Injection Pump. The single speed pump runs for approximately 90 seconds after engine start up.
* Below -10º C the pump is activated briefly to “blow out” any accumulated moisture."
If you get a code after 2 minutes it could also be linked to the delay after which the lambda sensor reaches its dew detection (all lambda sensor are heated in order to prevent short-circuit due to condesation of the exhaust gas on the sensor tip after cold starts).