Question about 1994 Cadillac Seville

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Obd codes for a 1994 cadillac seville sls

What does it mean when it gives a code 17 oxygen senor not ready?

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  • migman110563 Oct 01, 2008

    hey, would you by chance know how to fix the service ride controll it says the acculattors are grounded or open with all these codes i'm getting I think I might just need a new pcm. The codes I get are 14 coolant temp voltage low 17 which you answered 19 fuel pump voltage high which it's reading 2.4 volts , what do you think?

  • migman110563 Oct 02, 2008

    air ride is not working at all. should'nt you feel the car raise about 2" and hear it decompress when you shut it off?

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What that means is that the ecm(main computer) is not getting a voltage signal value from the o2 sensor. this could be due to a broken wire,bad plug or a bad sensor please rate this thanks

Posted on Sep 30, 2008

  • Ronald Mueller
    Ronald Mueller Oct 01, 2008

    those codes are most likely stored codes if your air ride is working properly I doubt that therev is a problem. as far as the coolant sensor it could be a loose connection or a bad sending unit. unless your coolant light is not on and it's not over heating, I would think it's a bad sensor..

  • Ronald Mueller
    Ronald Mueller Oct 02, 2008

    if your air ride is not working at all then your body control module is defective

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It means the heater circuit for the O2 sensor has failed. An O2 sensor has to be up around 900 degrees to function properly, and if its heater fails, it won't get up to temperature (thus the "not ready" diagnosis). Replacing the O2 sensor will fix your problem.

Posted on Sep 30, 2008

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What is the codepo135


PO135 is an (O2) Oxygen Sensor Fault (http://www.obd-codes.com/p0135)

PO153 is an (O2) Oxygen Sensor Fault (http://www.obd-codes.com/p0153)

PO174 is "Too Much (O2) Oxygen in Exhaust" (http://www.obd-codes.com/p0174)

PO300 is "Random / Multiple Misfire" (http://www.obd-codes.com/p0300)

It would seem these are all related to one or more spark plugs NOT firing. Since it isn't firing, Oxygen (O2) is being detected in the exhaust - when Carbon Monoxide (CO) is expected. Other sources of high O2 can be cracked manifold, exhaust pipes, etc. Good luck!

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Could Type: 1989 Cadillac OBD 1 Codes

It's all there on the internet

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