Z4M coupe Engine light on after running on 99 RON
- Thread starter tom21
- Start date
and on the oil contaminating the MAF.....
20. Will a K&N filter cause my vehicle's mass air sensor to fail?
No. This is an "urban myth" and has not been supported by any factual evidence. The oil does not come off of a K&N air filter when it is in use, even when over-oiled or in extreme air flow rates exceeding 1000 CF'M.
If somehow K&N air filter oil were to make contact with a mass air sensor, the oil would not cause the sensor to fail. We have intentionally coated mass air sensors with our filter oil, and monitored the sensors' output when installed in daily driven vehicles. These sensors continued to function normally, even after being sprayed and submerged in K&N air filter oil. K&N air filter oil does not cause problems with mass air sensors. More mass air sensor information.
20. Will a K&N filter cause my vehicle's mass air sensor to fail?
No. This is an "urban myth" and has not been supported by any factual evidence. The oil does not come off of a K&N air filter when it is in use, even when over-oiled or in extreme air flow rates exceeding 1000 CF'M.
If somehow K&N air filter oil were to make contact with a mass air sensor, the oil would not cause the sensor to fail. We have intentionally coated mass air sensors with our filter oil, and monitored the sensors' output when installed in daily driven vehicles. These sensors continued to function normally, even after being sprayed and submerged in K&N air filter oil. K&N air filter oil does not cause problems with mass air sensors. More mass air sensor information.
Beedub said:
That released from K&N was it...?
We junked them off the Rally cars that i used to look after when the Air mass reading would shoot down during the event.... This was 20 yrs+ ago,but the oil they used hasnt changed to my knowledge..
Any contaminant on the air mass will cause a problem.... you can see it plainly within live data on any decent diagnostic machine.
Why would cleaning the AFM then make it work correctly if contaminants didnt cause a problem..?
Anyway... down to the OP.. Try cleaning or replace and see how you go..
Picked the car up this morning, turned the ignition on, started it up and there is no EML on! I couldn't believe it, I drove it away and it is running fine again. I'm guessing there is something still not quite right with the sensor so i'm still going to give it a clean with the MAF cleaner when it arrives but fingers crossed it stays running well.
Im not going to get too excited as I still think there is a problem on the horizon somewhere. Cars can be frustrating sometimes!
Im not going to get too excited as I still think there is a problem on the horizon somewhere. Cars can be frustrating sometimes!
Z4M-2006 said:
not saying you or anyone are wrong just posting K & Ns response to this very "claim", for them to offer it in the FAQs id guess they have alot of people claiming for contaminated AFMs , just offering balance for the OP,... this is the internet land of the know it all, the fact finding needs balance otherwise people spend a small fortune on the route to fault finding.
tom21 said:Picked the car up this morning, turned the ignition on, started it up and there is no EML on! I couldn't believe it, I drove it away and it is running fine again. I'm guessing there is something still not quite right with the sensor so i'm still going to give it a clean with the MAF cleaner when it arrives but fingers crossed it stays running well.
Im not going to get too excited as I still think there is a problem on the horizon somewhere. Cars can be frustrating sometimes!
Light is back on again after another drive out in the car. Seems to drive better now, there is no hesitation in the engine.
Have you read the codes?
Apologies for the delay, ive not been able to look at the car before today. I cleaned the MAF sensor today and the issue still remained. I found an old OBD2 reader and through the torqued app i have found the following error codes:
P1424 - powertrain
P0172 - system too rich bank 1
p0175 - system too rick bank 2
does this shed any light? Ive ordered a new MAFsensor which arrives tomorrow. Interestingly the sensor that is currently in there is a bosch one so this has obviously been changed before.
thanks for help
P1424 - powertrain
P0172 - system too rich bank 1
p0175 - system too rick bank 2
does this shed any light? Ive ordered a new MAFsensor which arrives tomorrow. Interestingly the sensor that is currently in there is a bosch one so this has obviously been changed before.
thanks for help
Update:
New MAF sensor in and codes all cleared. Car is running perfectly and feels much quicker than even before the light came on. Must have been on its way out for a while. So excited to have the car back running smooth. Cant wait to take it out for a nice drive.
The torqued app on android worked perfectly.
thanks for everyones help.
New MAF sensor in and codes all cleared. Car is running perfectly and feels much quicker than even before the light came on. Must have been on its way out for a while. So excited to have the car back running smooth. Cant wait to take it out for a nice drive.
The torqued app on android worked perfectly.
thanks for everyones help.
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