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Thread: P0100-52 and P0400-11 faults solved! (on Z30DT)

  1. #1
    Regular Member jannie's Avatar
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    Vehicle : Vectra-C 3.0 Elite Estate

    Trim : Leather seats

    Engine : CTDI 3L (Z30DT)

    Year : 2006

    Mileage : 117000

    Red face P0100-52 and P0400-11 faults solved! (on Z30DT)

    I had these faults for 18 months because the garage could not find the problem.
    P0100 (52) not present Mass or volume Air Flow Sensor Circuit - Malfunction
    P0400 (11) present Exhaust Gas Recirculation Flow Excessive
    The car was always in limp mode and ran very unevenly.

    The result was that the car stopped running due to a blocked DPF and the swirl flaps often got stuck open and closed - all due to the wrong fuel mixture.

    I finally decided to run tests on the EGR. 12VDC across pin 4 (Red/Yellow) (+ve) and pin 6 (Pink/Yellow). The valve clicked in and out. Then applied 5VDC across pin 1 (+ve)(Red) and pin 2 (Black/Red) and measured the sensor signal on pin 3 (Orange/DarkGreen) while varying the solenoid signal from 0 to 12V. Could not detect anything. But on OP-COM the EGR Output test showed a signal so I was relatively happy.

    After checking for leaks in the pipes, I then decided that the problem may be with the MAF, which I had replaced one year before the faults appeared. The OPCOM MAF signal was erratic, confirming a problem. Fortunately my garage had a second-hand Volvo MAF insert which is also a Bosch F00C 2G2 061 (and the same MAF seems to be used for Mercedes and Audi - look around for a cheaper option than the stock Vauxhall part - you only need the insert).

    All problems instantly disappeared after replacement and a whole 200ml can of Wynn's Carbon Buster (Compression Stabilizer) sprayed into the inlet to get rid of the stuck swirl flap faults. Finally. Yeay.

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    Forum Moderator soulman's Avatar
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    Vehicle : Toyota

    Trim : Yaris Hybrid

    Engine : 1.5 Hybrid

    Year : 2021

    Mileage : 5525

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    Thanks for sharing ,still a new member ? even tho you joined in 2017 ,have you ever posted up a picture of your car ??

    welcome by the way

  4. #3
    Regular Member jannie's Avatar
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    Vehicle : Vectra-C 3.0 Elite Estate

    Trim : Leather seats

    Engine : CTDI 3L (Z30DT)

    Year : 2006

    Mileage : 117000

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    Quote Originally Posted by soulman View Post
    Thanks for sharing ,still a new member ? even tho you joined in 2017 ,have you ever posted up a picture of your car ??

    welcome by the way
    I have posted quite a few times (mostly questions). No photo submitted but I have a stock standard blue 3.0l Estate. Should I post a pic somewhere?

    BTW, I lived in Romford for 3 years before returning to South Africa, with my Vectra-C in tow, because I couldn't get any decent money for it. The only problem here is spares and agents - we have neither. GM left the country recently and also the Vectra-C was never sold here.

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    Forum Moderator soulman's Avatar
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    Vehicle : Toyota

    Trim : Yaris Hybrid

    Engine : 1.5 Hybrid

    Year : 2021

    Mileage : 5525

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    Oh yes very important to post pictures ,did you ever introduce yourself ? there is a forum section for that . Romford just up the road from me in Aveley .

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