CEL + other lights after CAI Install

I'm a little new to modding so bare with me!

Recently I installed the PRL Cobra Street CAI on my '19 Si and it's been treating me well! However, a couple days ago my CEL turned on and all the extra systems in the car shut off, like TCS, Power Steering, Brake Hold, Hill Start Assist and Emissions System.

I did some more research and found that I needed to reset my ECU after installing the part, so I did. Lights turned off, ran it through an idle learn and it was fine for about 70 miles until they all popped back on. I decided to clean the MAF Sensor and reset the lights again and found that the issue still popped after the same 70 mile mark. The engine code being thrown is P0171 - System too lean Bank 1

Below is pictures of my dashboard & the intake installed on my engine.




Any ideas? I've tried ECU reset, battery reset...I was told on PRL's site that the street version wouldn't require a tune so I'm a little lost on where to go from here. The tubes seem tight up top so I don't feel like it's a vacuum leak.

Try reconnecting the maf sensor

Are you sure it's the street version?

Steelsi said:

Try reconnecting the maf sensor

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I did try that after cleaning it. Put me back to square one after 70 miles like in the OP.

REBELXSi said:

Are you sure it's the street version?

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I'm 99% sure it is, or at least should be -- my receipt from their site says I purchased the Street version. Is there a way for me to tell if it's Street vs Race on the actual parts?

It should how an r for race maf

Steelsi said:

It should how an r for race maf

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And that it is Si version. Should be marked Si in upper left corner of MAF.

Right on the head -- I got sent a racing MAF housing and didn't even notice haha.


Here's hoping they'll let me swap this out for a Street one. Thanks guys!

Np good luck I’m pretty sure they would sense I accidentally bought the non si version maf and then called them and they switch it out to the si maf

Now I'm going to have to check mine when I get home, lol. What issues would I have running a non SI housing on my Si?

Driver56 said:

Now I'm going to have to check mine when I get home, lol. What issues would I have running a non SI housing on my Si?

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Well it should say si In the top

Driver56 said:

Now I'm going to have to check mine when I get home, lol. What issues would I have running a non SI housing on my Si?

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Messed up AFR.