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This is a discussion on CEL help within the Tuning: Electronic Engine Management forums, part of the Tech & Modifying & General Repairs category; I just went stage II, power is great but I keep getting this CEL, I have cleared twice but it ...

  1. #1
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    CEL help

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    I just went stage II, power is great but I keep getting this CEL, I have cleared twice but it keeps coming back after 3- 4 days, the code is 21BO, What could it be?, any input will be appreciate it.
    Thank You

  2. #2
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    there is no code with that number all codes begin w/ P####....the letter P & then 4 numbers.....

    who's STG2....Cobb, TurboXS, etc....
    1988 Celica Alltrac
    Hallman Pro, 15x7.5 +20mm Rota Slipstreams
    2005 LGT 315whp/340wtq@21psi - Sold
    VF52, Crucial P&P&C Manifolds, UP, DP, RP, Magnaflow CBE, Hallman PRO, ROMRaider
    2003 WRX 371whp/355wtq@24psi - Sold
    TD05H-20G-38mm Tial, Meth Injection, Hyperflow TMIC, ROMRaider
    Dyno Chart METH vs 93 oct

  3. #3
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    I know, I looked in the manual and i could not find the code (I have Cobb).It's strange or I could be reading the code incorrectly, I have to check again

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