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Thread: Po700

  1. #1
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    Default Po700

    Saw a flicker of spanner when I pulled into the mother in laws today, then when I left it came on again and felt like in limp mode, but 600yds later the spanner disappeared and boost felt good again.

    I checked codes when I got home and have two pending faults, P0100 and P0101, and a actual fault P0700 which indicates ambient temperature wrong. So from that I assume just replacing the boost sensor (was cleaned 2 months ago so assuming is faulty not dirty) should get rid of that problem, and as a consequence, the pending faults.

    So question is, where on a Sunday can you get a boost sensor? No where I;m guessing.

  2. #2
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    Try another clean up 1st, remove the elbow & give that a right good clean too with carb cleaner

  3. #3
    Regular Member gtr1000's Avatar
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    Vehicle : Insignia

    Trim : Sri

    Engine : 140 Ecoflex S/S

    Year : 2013

    Default

    As you've mentioned "ambient air temperature", could it be the MAF sensor as this also measures air temp?

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    Thanks DH, I was going to check if it needed cleaning again, was just assuming after only 2 months it shouldn't need it again.

    GTR1000, not sure, I thought the MAF just measure the airflow density/speed and the boost sensor measured air temp. But I'll go and have a look in a mo, just letting me breakfast go down.

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    le double post

  6. #6
    Regular Member gtr1000's Avatar
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    Vehicle : Insignia

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    Default

    Little bit of techy reading for the hot wire type MAF. http://www.sensorland.com/HowPage060.html

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    Default

    thanks, but I still think its the MAP/Boost sensor as the associated codes are to do with the manifold, therefore as the MAP takes the temp in the inlet manifold I assume it is the boost sensor giving the wrong temp.
    Plus, I did take it out today, didn't look particularly at all, but I sprayed some WD on it, gave it a wipe and chucked it back in, cleared codes and went for a 10 mile drive, no repeat codes, but oddly the temp readings were still fluctuating from about 15-26C, which given the ambient this morning were about 9C I think, and the engine was cold, thats a big fluctuation, so I think I'll splash out on a new MAP sensor for now.

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