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2004 Ford Expedition Question: speedo stoppedworking



troyk85, 4.6L V8, Wake Island, HI, August 05, 2014, 03:33

I own a ford in australia, my problem is the speedo stopped, Ive done some tests myself an the only fault i've found is the signal coming from 1 abs sensor is a tiny bit different then the other 3. In this case the 4 ABS sensors each send a signal to the ABS module which then send a signal via CAN to the ECM. Ive pulsed my own signal to the ECM with a test tool I own just to see if the ECM is working fine which it is, I got the speedo to work using this tool. Im just curious to know if I erratic signal from a wheel sensor would cause the speedo to not work or perhaps the ABS module is faulty internally. Any help would be greatly appreciated.

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    Greg's Orange Auto (14194 Answers) , Orange, CA - (714) 361-9386
    globalhelper August 05, 2014, 06:00

    do you have any codes?

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    troyk85, August 05, 2014, 15:04

    Yeah 2 codes. One is p0602 powertrain control module programming error. And p0500 speed sensor A. Missing or erratic speed signal. The first one has been there for a long time though an speedo was working when I saw that code.

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