Hi all. Long time lurker and learned soooo much from you guys so thank you!!
Today I need some advice with these codes I've been getting.
Background: I have a (May) 2004 330i. I pulled the intake to locate a leak and fixed it (oil filter housing gasket). I also replaced the manifold and throttle body gasket along with replacing broken or brittle vacuum pipes since it was apart. This was about a year ago. Since putting it back together I have gotten P0171 (System too Lean (Bank 1)) and P0174 (System too Lean (Bank 2)) codes intermittently. Seemed to happen more when it was cold but not always, however that was the only pattern I could discern. The codes started with reading as two of each then went to two of P0171 and one P0174. I figured it was air in the line since I popped the fuel line off when doing all that work, but then more recently was thinking it was the fuel filter and need to get to it (48k miles now).
Yesterday I got the three codes again, though this time when I read the codes I also had a P0460 (Fuel Level Sensor Circuit Malfunction).
Initial searching brought me to TKC's thread where he replaced the sender, pump, and filter. http://forum.e46fanatics.com/showthread.php?t=592414
I haven't had a chance to pull it apart again to make sure the elbows were tight and no new holes (I had to get a new elbow off the TB because I butchered the old one to get it off) as I've found that and bad precat O2 sensors can cause the 171/174 codes. But now with this new code I'm getting a little worried. I need this car for work (unfortunately I do some field service in it) so pulling it apart has been backseated. It can be sluggish at times but it usually only lasts a second or two. And the SES comes one usually after driving and I'm stopped at a light.
Does this sound like I need to replace the sender, pump, and filter? Could the codes be coming from something I did in the engine?
I have INPA on my laptop and can see misc levels from the engine and I noticed the precat O2 sensors were only at 49%-50% while the postcats were 100%. This was with the engine temp at normal/middle of the gauge.
I'm unfortunately on a budget and at times have limited time to work on it so any help, suggestions, advice, BS to narrow it down is so gratefully appreciated!
Also if I'm not in the right forum I'm truly sorry. I wasn't sure if this was the right one or the DIYor even the Tuning and Tech/Driveline was the right place.
thanks!
Today I need some advice with these codes I've been getting.
Background: I have a (May) 2004 330i. I pulled the intake to locate a leak and fixed it (oil filter housing gasket). I also replaced the manifold and throttle body gasket along with replacing broken or brittle vacuum pipes since it was apart. This was about a year ago. Since putting it back together I have gotten P0171 (System too Lean (Bank 1)) and P0174 (System too Lean (Bank 2)) codes intermittently. Seemed to happen more when it was cold but not always, however that was the only pattern I could discern. The codes started with reading as two of each then went to two of P0171 and one P0174. I figured it was air in the line since I popped the fuel line off when doing all that work, but then more recently was thinking it was the fuel filter and need to get to it (48k miles now).
Yesterday I got the three codes again, though this time when I read the codes I also had a P0460 (Fuel Level Sensor Circuit Malfunction).
Initial searching brought me to TKC's thread where he replaced the sender, pump, and filter. http://forum.e46fanatics.com/showthread.php?t=592414
I haven't had a chance to pull it apart again to make sure the elbows were tight and no new holes (I had to get a new elbow off the TB because I butchered the old one to get it off) as I've found that and bad precat O2 sensors can cause the 171/174 codes. But now with this new code I'm getting a little worried. I need this car for work (unfortunately I do some field service in it) so pulling it apart has been backseated. It can be sluggish at times but it usually only lasts a second or two. And the SES comes one usually after driving and I'm stopped at a light.
Does this sound like I need to replace the sender, pump, and filter? Could the codes be coming from something I did in the engine?
I have INPA on my laptop and can see misc levels from the engine and I noticed the precat O2 sensors were only at 49%-50% while the postcats were 100%. This was with the engine temp at normal/middle of the gauge.
I'm unfortunately on a budget and at times have limited time to work on it so any help, suggestions, advice, BS to narrow it down is so gratefully appreciated!
Also if I'm not in the right forum I'm truly sorry. I wasn't sure if this was the right one or the DIYor even the Tuning and Tech/Driveline was the right place.
thanks!