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Thread: What is the most logical approach to tackling a P1105 fault code?

  
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    Billy Dean's Avatar
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    What is the most logical approach to tackling a P1105 fault code?

    I now only have the one fault code registering on my ECU after doing the pedal test.

    It is P1105 which lists “Barometric Pressure Sensor Wrong Signal”.

    I have read numerous posts on here, when confronted with such a fault code, that make mention of replacing the MAF sensor, Boost Sensor, Barometric Pressure Sensor, check the Earth connection etc. etc.

    What would be the best and most logical step-by-step approach to addressing this fault?



    N.B. My car runs fine. This is why I am even more confused

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    I am still getting this fault code.
    Again, my car is running fine (as far as I can tell!), so it is really confusing me!
    e.g. I did a 225 mile round-trip to London Heathrow yesterday and the warning light did not come on once even.
    Then I drove back from my brother's house late last night (after the car had sat idle for 50 mins) and the light came on pretty quickly.

    Looking at the above incidents, there is no discernable pattern for the light coming on... but it definitely does seem to come on mostly when the engine is warm / 10 mins in though.

    My mechanic just tells me to keep driving it until something goes majorly wrong But the way I see it, if the light comes on then surely something is wrong somewhere..

    Any help would be much appreciated.

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