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Thread: LT4 10 speed baro code 2227 and 2228

  1. 09-21-2021 #1
    vannatta20
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    LT4 10 speed baro code 2227 and 2228

    This is driving and idling great but I keep getting baro codes p2227 and p2228. How do i tune this properly for the codes to go away? These can not be deleted or bad things happen...
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    Last edited by vannatta20; 09-22-2021 at 01:53 PM.
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  2. 09-21-2021 #2
    sevinn
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    Baro reading is extremely unrealistic and moves around alot between mid 20s-mid 50s kpa in your log.

    what's the sensor setup like? Is this a swap vehicle with broken out baro?
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  3. 09-21-2021 #3
    vannatta20
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    This is in a swapped vehicle. The baro is broken out and is in the supercharger by the throttle body. I dont know if this is the correct way of doing this. I am using a 2018 truck OS running the 10l80 transmission. It is running the stock LT4 map sensors.
    Last edited by vannatta20; 09-21-2021 at 06:54 PM.
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  4. 09-21-2021 #4
    sevinn
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    On an lt4 swap you can leave baro in the maf or let it dangle in the engine bay. The important bit is the lt1/lt4 tmap conversion harness.
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  5. 09-21-2021 #5
    vannatta20
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    That fixed it!! Thanks so much! Why do you think it sets the baro code when using the stock baro in the mass air flow sensor?
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  6. 09-21-2021 #6
    sevinn
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    It's still throwing it in the maf sensor? Usually that works out okay. In theory I guess it could see vacuum there. You got a log of it using the maf one?
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  7. 09-21-2021 #7
    vannatta20
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    I?ll get a log off both of the Lt4 swaps. One is a cammed l83 Lt4 and the other is that stock Lt4 . Both had the issue
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