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CEL came on after getting CAI

Myersdj

By Myersdj
in Troubleshooting & Recalls

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Myersdj Enthusiast

Myersdj

Posted
Posted

So I drive a 2018 Chevy Silverado crew cab 5.3L V8 and I just had a S&B CAI installed. A few engine cycles later my CEL came on.  The code is p0102 (MAF Sensor). I’ve tried a few different things that makes the CEL go away but it keeps coming back. Any advice on what to do is appreciated!

catpartsman Enthusiast

catpartsman

Posted
Posted

Go to a place like Autozone or O’Reilly’s and see if they won’t reset it if you don’t have a reader. When you unhooked it to install the new CAI, it triggers a code.


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2017_whitez71 Enthusiast

2017_whitez71

Posted
Posted
27 minutes ago, Myersdj said:

So I drive a 2018 Chevy Silverado crew cab 5.3L V8 and I just had a S&B CAI installed. A few engine cycles later my CEL came on.  The code is p0102 (MAF Sensor). I’ve tried a few different things that makes the CEL go away but it keeps coming back. Any advice on what to do is appreciated!

Is it a wet filter?  If so may have had too much oil and it got on the MAF sensor.

qwank Senior Enthusiast

qwank

Posted
Posted

check to make sure both breather hoses are tight at the intake tube and the engine ends.  And all other connections are tight and installed properly.  and make sure the MAF is plugged in all the way  

 

 

Sierra Dan Senior Enthusiast

Sierra Dan

Posted
Posted

Might also try cleaning th sensor with spray.

Did the sensor get bumped or maybe touched on disassembly or reassembly?

pgamboa Senior Enthusiast

pgamboa

Posted
Posted

I thought I remember the battery needing to be disconnected when disconnecting the MAF sensor?


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Myersdj Enthusiast

Myersdj

Posted
  • Author
Posted
15 minutes ago, pgamboa said:

I thought I remember the battery needing to be disconnected when disconnecting the MAF sensor?


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I’ve disconnected/reconnected the negative side of the battery a few times now....it works, but only for about 30 minutes 

Myersdj Enthusiast

Myersdj

Posted
  • Author
Posted
1 hour ago, qwank said:

check to make sure both breather hoses are tight at the intake tube and the engine ends.  And all other connections are tight and installed properly.  and make sure the MAF is plugged in all the way  

 

 

Everything looks good to me 

pgamboa Senior Enthusiast

pgamboa

Posted
Posted
I’ve disconnected/reconnected the negative side of the battery a few times now....it works, but only for about 30 minutes 

Must be something else triggering it then.


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cbrsilv15 Senior Enthusiast

cbrsilv15

Posted
Posted

1 - take it back to where you had it installed and let them deal with it, or

 

2 - disconnect the neg cable for 30 mins.  Unplug MAF sensor plug and reseat it.  Connect battery and it should be good to go.  Like mentioned earlier, if you unplug the sensor with the battery connected, it'll throw a code.  Nothing really to worry about though.

Sierra Dan Senior Enthusiast

Sierra Dan

Posted
Posted

I have unplugged my MAF sensor connector to replace the passenger headlight bulb without disconnecting battery cable.

It was probably disconnected for 20 min or so, and I never had the CEL come on after hooking everything back up.

Darmichar Enthusiast

Darmichar

Posted
Posted

Make absolutely sure the MAF plug is seated completely, too.  I unplugged mine once when taking out the airbox to swap headlights and didn't get it plugged back in all the way.  Drove me nuts for a couple days trying to figure out what was wrong.

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