ECU Codes - opinions please. | FerrariChat

ECU Codes - opinions please.

Discussion in '348/355' started by blue986, May 14, 2008.

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  1. blue986

    blue986 Karting

    Oct 12, 2007
    177
    Maryland
    Full Name:
    Matt
    2 months into Ferrari and recently both CEL's (NOT slow down) came on during a drive. The CEL for bank 1-4 has come on once before with some associated strange engine behavior so I wasn't surprised by it coming on again. CEL for bank 5-8 come on for about a second - along with 1-4 - while driving this weekend and again, wasn't surprised because I've been lurking on this forum for about 14 months and know the CEL's are just a fact of life. Not in a panic or anything and my first course of action will be to disconnect the battery and perform ECU "re-learn". But if that doesn't clear any or some of the codes and I have to start turning wrenches, I figured I'd take a different approach and post the codes I pulled along with the steps I plan to take to remedy the CEL's and get input/advice on anything I may be missing.

    Code 1112 (Engine Coolant Temp Sensor) on Bank 1-4. Pull electrical connections for Engine Coolant Temp Sensors under intake plenum, clean sensor connections and wire connections with contact cleaner, apply Stabilant 22a and reconnect.

    Code 1113 (Throttle Potentiometer) on Bank 1-4. Disconnect TPS, remove throttle body, clean idle air bypass passages and re-set set screw (per proper procedure), replace gasket if necessary, re-install throttle body, clean and apply Stabilant to all electrical contacts and re-connect. I'm pretty positive this will resolve the issue because I have classic symptoms of this issue - burbling exhaust on decelleration, rough/searching idle, etc...

    Code 1211 (MAF or O2 Sensor) on BOTH Banks. Since I have no idea when (or if) the MAFs were ever cleaned and since the majority of parts that have to be removed to address all of these codes are related or in close proximity, I am going to remove the MAFs first and clean them with MAF cleaner, pull the connections for the O2 sensors then clean and apply Stabilant to connectors and re-assemble . If the code persists on one bank, I will then swap O2 sensors to see if the problem follows and replace both O2s if the code persists on both.

    Code 4121 (Catalyzer Temp ECU) on BOTH Banks. Remove ECUs and dry with automotive heat gun (set to appropriate temp), seal and re-install. Just washed, polished and waxed the car and assume some water got in them - just hoping there isn't too much damage and this fixes them so replacements aren't necessary (while @ ~ $330 per from Ricambi to replace isn't bad for "Ferrari World", I'd obviously still like ot avoid it).

    If I missed anything, or anyone has something additional to add, the input is appreciated.

    Thanks,
    Matt
     
  2. ernie

    ernie Two Time F1 World Champ
    Lifetime Rossa Owner

    Nov 19, 2001
    22,620
    The Brickyard
    Full Name:
    The Bad Guy
    Sounds like your on the right track Matt.
     

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