SES after CAI & MAF install

[KingCon]

I installed an AFE CAI on Wednesday and a Dinan MAF chamber on Thursday. I cleaned the MAF sensor with CRC MAF cleaner during the install. I had no problems after the install. Everything ran smoothly.

This morning after letting the X warm up, I noticed the SES light was on. After restarting the car it still was on.

I am wondering if any of my modifications could have caused this? Or did I miss a step during the install although it seemed a pretty straight forward swap etc.

I'm sure I'll have to take it and get the codes read, but some advise prior always seems to help.

[mrbmwx5]

Make sure all connectors are tight.

[KingCon]

Originally Posted by mrbmwx5

Make sure all connectors are tight.

Meaning between the CAI and MAF where the screwed clamp rings are? The MAF sensor is pretty secure, I didn't disconnect it when I cleaned it, just spayed it down and let it air dry on a towel.

Also my CAI came with an oiled filter (I've already ordered the Pro Dry S). I figured I could clean the MAF sensor when the new filter came in but seems I've already got a problem.

[KingCon]

Originally Posted by mrbmwx5

Make sure all connectors are tight.

With all the connections tight, and the only codes showing are lean bank 1 & 2. Is it okay for the SES light to stay on? I'm guessing it will spit out those codes until the ECU is reprogrammed? I just don't have the extra cash right now for Stage 1 engine/tranny software.

[macadamia]

How long have you driven it since you had the MAF fixed? When I replaced my cam shaft position sensor on my '99 e36 323i vert, it took a couple of days for the light to go out. I'm not sure why it took this time, but it did eventually go out.

Maybe you are experiencing the same issue?

[TheKingSim0n]

Your gonna have to get the codes to really know whats going on, once you get the codes post em up and see if anyone can help

[jst2878]

make sure the maf sensor isnt in backwards and check for any leaks in the intake such as a loose hose clamp. check that and reset your battery for a few minutes. if that doesnt work get a diagnostic done to punch out some codes. good luck and report back with the solution

[KingCon]

Originally Posted by jst2878

make sure the maf sensor isnt in backwards and check for any leaks in the intake such as a loose hose clamp. check that and reset your battery for a few minutes. if that doesnt work get a diagnostic done to punch out some codes. good luck and report back with the solution

Okay, could you tell me how to reset the battery?

[Icer006]

I think you should forget about resetting the battery, get an OBD2 reader, read the code, and go from there.

[KingCon]

Got an appointment to at the shop to get the codes read this afternoon. I'll update after, thanks.


Just to make sure, the DINAN MAF chamber should be installed with the word DINAN facing away from the engine?