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ecu malfunction code

This is a discussion on ecu malfunction code within the General Help forums, part of the LSx Technical Help Section category; I had a few codes read by the dealership today ecu malfunction C0550 was one of them. My gauge lights ...

  1. #1
    tattoo artist,esquire sic2001's Avatar
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    navy blue metallic
    2001 trans am

    ecu malfunction code

    I had a few codes read by the dealership today ecu malfunction C0550 was one of them. My gauge lights have been comming on steady (tcs off, abs inop, and brake lights all come on evrytime I drive now. What is the ecu and where is it?

  2. #2
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    C0550 is an EBCM (Electronic Brake Control Module) code. Looked it up in my helms and it says to diagnose any other C codes first, if it's the only code then replace the EBCM.

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    tattoo artist,esquire sic2001's Avatar
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    navy blue metallic
    2001 trans am

    there is another code C0896 -device voltage range/performance and U1301- communication
    any help with these 2? I cant find anything on them

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    navy blue metallic
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    where is the EBCM? Is that the hunk of alum with the brake lines comming out?

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    Yeah, believe that's it, not sure if there's a separate module - but plugs in there. Thumbed through helms and C0896 says EBCM operating voltage falls below 9.4V or above 17.4V, check voltage, use scan tool, etc., step 10 says replace EBCM. U1301 says no class 2 serial data messages valid. Module operation requires serial data communication to occur. Don't have a clue what your issue is but I'd check all fuses that have anything to do with ABS or traction control - almost sounds like it's dead or not getting power? Hope this helps....

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    tattoo artist,esquire sic2001's Avatar
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    navy blue metallic
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    cool thanks alot, Ill check all tht and get back to ya.

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    tattoo artist,esquire sic2001's Avatar
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    navy blue metallic
    2001 trans am

    figured it out, it was the foglamp wire in front of the radiator. There is a connection there that can get corroded. I just cut ot and used a wire connector and BAM no more lights.

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    Wow, glad it wasn't anything serious. Helms never mentioned anything close but they assume you're using a scan tool during the diagnostics which probably would've helped nail it down.

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    navy blue metallic
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    yeah, after 2 days I assumed it was fixed but alas, the lights came on today. Ive checked the fuses and everything underneath, whats serial communication mean?

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    navy blue metallic
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    update, replaced EBCM (35.00 shipped on Ebay) today and no lights, problem solved...finally

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