P0121 P0221 and P0101 codes
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Cadillac SRX Second Generation Forum - 2010+ Discussion, P0121 P0221 and P0101 codes in Cadillac SRX Forums; P0121 P0221 and P0101 codes Got all these Codes, I have had the MAF code before so I am thinking ...
  1. #1
    kanundrum is offline Cadillac Owners Member
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    P0121 P0221 and P0101 codes

    P0121 P0221 and P0101 codes
    Got all these Codes, I have had the MAF code before so I am thinking its a bad MAF just wondering if the MAF would throw those codes as well or its something more in depth I should look at with the Throttle position Sensor

    2.8T Motor

    http://www.obd-codes.com/p0121

    http://engine-codes.com/p0221.html

    Any Hints or should I start by replacing the MAF and the TPS(Not even sure where that is) MAF was cheap enough that I ordered a new one

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    TheCaptain's Avatar
    TheCaptain is offline Canadian SRX Mod
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    Re: P0121 P0221 and P0101 codes

    It's most likely the MAF. Its also easy enough to start there (which you have).
    I bet a new MAF will fix all three. (chain reaction codes)
    When you turn your car on, does it return the favour? '14 Cadillac ATS Performance 3.6L AWD in Phantom Grey Metallic and Morello Red Interior on order...


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    kanundrum is offline Cadillac Owners Member
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    Re: P0121 P0221 and P0101 codes

    Awesome Thanks yea getting the new MAF in tom so lets see. The K&N Probably messed it up, or it was already messed up and the K&N didn't help. Just a simple drop in filter too

  5. #4
    TheCaptain's Avatar
    TheCaptain is offline Canadian SRX Mod
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    Re: P0121 P0221 and P0101 codes

    I have seen these codes thrown a lot on GM vehicles with a dirty MAF. Most usually from K & N filters...
    When you turn your car on, does it return the favour? '14 Cadillac ATS Performance 3.6L AWD in Phantom Grey Metallic and Morello Red Interior on order...


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  6. #5
    Jim_V is offline Cadillac Owners Fanatic
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    I have a K&N also and just spray electrical contact cleaner to eliminate any problems. Just don't touch the sensor wire let the spray do the work.

  7. #6
    kanundrum is offline Cadillac Owners Member
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    Re: P0121 P0221 and P0101 codes

    Quote Originally Posted by Jim_V View Post
    I have a K&N also and just spray electrical contact cleaner to eliminate any problems. Just don't touch the sensor wire let the spray do the work.
    DId it about 3 times now, I just got the MAF in will clear the codes replace the part and see how it starts up!

  8. #7
    redvett94 is offline Cadillac Owners Fanatic
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    Re: P0121 P0221 and P0101 codes

    When you get it fixed throw the K & N in the trash and use a paper filter for better filtering. Paper filters are good for 30000-50000 miles and will NOT reduce fuel economy since the engine management system will always keep the A/F ratio at 14.7. If you drive in high dusty conditions you may want to replace filter earlier.

  9. #8
    kanundrum is offline Cadillac Owners Member
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    Re: P0121 P0221 and P0101 codes

    Was never looking for fuel economy, more power was always my goal. Even though it maybe hard to believe, the difference with the K&N was massive. Could hear the Turbo Spool up and a noticeable amount of power, but probably also the reason why I got the Codes. Never had an issue on any other car !

  10. #9
    kanundrum is offline Cadillac Owners Member
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    Re: P0121 P0221 and P0101 codes

    Changed the MAF and got the code on again after, weird installed a brand new filter and MAF and got the P0101 code (not the others). Lets see what happens

  11. #10
    kanundrum is offline Cadillac Owners Member
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    Re: P0121 P0221 and P0101 codes

    So the first time the CEL came on I got P0101, now the 2nd time I got P0121. The car is screwing with me! haha. This is even after I changed the MAF to a brand new Unit. Any ideas Folks ?

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