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p1421
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  1. E36 (1991 - 1999)
    So my dad picked up a used 328i 97 with some issues. guy said the check engine light came on because it needed a oil change (yeah right) he was surprised when I popped out my OBDII scanner and found the following codes: P1250 : Manufacturer Control P0455 : Evaporative Emission System Leak...
  2. E46 (1999 - 2006)
    hey im new here my friend told me about this forum so i came for some help, i have a couple check engine lights codes and was wondering if someone could help me out p1477- EVAP control system LDP malfunction p1423- secondary air injection system output to small p1421- air injection valve...
  3. E46 (1999 - 2006)
    hey im new here my friend told me about this forum so i came for some help, i have a couple check engine lights codes and was wondering if someone could help me out p1477- EVAP control system LDP malfunction p1423- secondary air injection system output to small p1421- air injection valve...
  4. E46 (1999 - 2006)
    Okay, so this all started about a month ago. I was speeding in a hurry on the highway and I was in last gear (automatic trans). I red lined without noticing but this happened only for several seconds. ON the way back home 30 minutes after the car redlining. At a stop light I noticed my car...
  5. E39 (1997 - 2003)
    After chasing gremlins related to fault codes P1421 & P1423 for a while now to no avail: :mad: (Confirmed air pump was working, replacing the "sponge" filter on top of the air pump, and replacing the check valve off the exhaust manifold), I used the wet finger vacuum check tool :bigpimp: and...
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