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Followup To
Question -
had the car to the dealer they said this po501 vech. speed sensor cir. invalid signal type A or B p1740 trans. torque reduction request no signal type C or D B1556 BCM e prom write error
any help?
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Followup To
Question - correct but all four wheel sensors are good had them checked
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Followup To
Question -
ABS light and traction control light on spedometer not working. What could this be? 1998 year.
Answer -
Catera's require the use of an advanced electronic scanner in order to diagnose the problem of which your dealer has.
yes i am a car dealer took it to the cadillac dealer and they said speed sensor, but could not tell me what one there are four (4).
Answer -
Your going to have to ask them what the CODE # was that the scanner produced.
Answer -
I can get the code # because I have a high dollar scanner. But I do not have access to the vehicle in order to get the code #. Without the code # there is NOTHING we can do.
AnswerYour fault is within the:
ECM (computer)
Theft deterrent module
EBTCM (Electronic Brake Traction Control module.
Without the scanner there is no way to test these components.
I can e-mail you the diagnostic procedures for all the codes if you want. Contact me at:
[email protected]
and include your complete question above when you contact me.
