Question about 1996 Mazda Protege

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Code P1195 Hello...my check engine light is on...so i got someone to use a code reader and the code P1195 came up ...what is the problem? My Haynes manual does not mention that code!

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That code is for the EGR boost sensor. It has an open or a short in one of the wires.

For one thing the CEL being on all the time how will you know if something else comes up, short of it running bad or worse. The EGR serves two functions. It lowers NOx and allows for greater timing control. If the EGR is not working and the PCM advances the timing when there's no EGR it can cause excessive spark knock. If the knock sensor doesn't work it can cause severe engine damage. If the knock sensor works and the PCM lowers advance the biggest problem you'll have is polluting.

Hope helped (remember rated this help) Good luck.

Posted on Dec 04, 2009

  • ZJ Limited
    ZJ Limited Dec 04, 2009

    Other refer to the code P1195 in most case is set due to the folowing:
    Boost sensor solenoid
    Boost sensor
    Vacuum or vacuum hose problem
    Open or shorted wire.

    The
    repair is as followed, Check for reference voltage of 4.5 - 5v on the
    Light Green signal wire, with the sensor unplugged. If there is no
    reference voltage with the sensor unplugged check for an open or
    shorted wire between the Powertrain Control Module (PCM) and the boost sensor.

    Plug the sensor in and see if the voltage drops about 0.5v when plugged
    in. If the voltage goes to 0 or does not change at all, the sensor may
    be faulty. Tap on the sensor and see if the voltage glitches out. If
    so, the sensor may be faulty.



    Check the operation of the boost sensor solenoid. Does it have good vacuum to it? If not, check for a plugged port in the intake manifold. See that the solenoid switches vacuum on and off when it is energized.
    If not, the solenoid may be faulty. Check the voltage on the boost
    sensor as the solenoid is turned on and off with the engine running,
    the voltage should read about 1.3 volts with manifold vacuum.



    Here is the picture to help you locate the Boost sensor.




    Good luck.

  • raj_khan_99 May 11, 2010

    I have had this same problem of code 1195. I recently took my car to a mechanic and he said that EGR valve (cost: $350) will have to be replaced. Do I really need to get that replaced? And, will it solve this problem and switch off the check engine light? Thanks

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P1195 Mazda EGR Boost Sensor Circuit Malfunction
egr boost solenoid

Posted on Dec 04, 2009

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P1195

Mazda:
BARO Sensor Circuit

Posted on Dec 04, 2009

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