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Thread: Vectra 2.2 Estate 'Rear' Lambda Sensor?

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    Default Vectra 2.2 Estate 'Rear' Lambda Sensor?

    Hi Guys,

    When I bought the Vectra was told it needs a rear lambda sensor?

    It was ok on drives but it seams to be getting worse, just put foot down and nothing really happens apart from like a back fire sort of thing from the exhaust. Then I can turn it of back on and it can be a little easier, seams to do it from 60-70 then once at 70 it seams to calm down.

    How much am I looking for a rear lambda sensor? Don't mind ebay if theres an links floating about?

    Changed one on my old 306 Cabby just past the cat, so what's the location of the rear one on these? Easy to do?

    I always thought they onl had 1 lambda sensor so proove me wrong haha!

    Thanks in advance!

    Simon

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    Anyone? Help would be appreciated.

    Cheers!

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    Regular Member Caveman_nige's Avatar
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    Vehicle : Vectra and a Signum

    Trim : top of the line in both

    Engine : Z18XE,Z19DTH,Z20NET

    Year : 2006

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    is your car the 2.2 diesel or petrol... the rear lambda on mine is just after the flexi pipe...

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    It's a 2.2 petrol mate, cheapest I've found is £50 bit doesn't say if that's the rear one or not.

    I should be able to get to the rear one and fit it myself then eh?

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    Regular Member Caveman_nige's Avatar
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    Vehicle : Vectra and a Signum

    Trim : top of the line in both

    Engine : Z18XE,Z19DTH,Z20NET

    Year : 2006

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    you can change it yourself.. i think it comes with a decent length of cable attached and the connector plug on the end of that, the connection to the loom is in the back of the engine bay if i remember rightly.. I think the length of the cable is all that differenciates it from the front lambda sensor that is on the top part of downpipe (well it is on mine). Most lambdas are Bosch anyway so you could just find the oem part number and mod your cable onto it.. If you give a vx parts department a call they will verify the part number for you. Its probably the same part number for the saab so search under them for replacements as well...

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    Regular Member rushy's Avatar
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    Vehicle : SRi


    Engine : Z22SE (2.2 Petrol)

    Year : 2004

    Mileage : 137000

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    One little thing, does it rev fine to say 2-2500 revs then start to struggle further up the range? Its just you mentioned it struggles getting to 70, but once there its fine.

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    Quote Originally Posted by rushy View Post
    One little thing, does it rev fine to say 2-2500 revs then start to struggle further up the range? Its just you mentioned it struggles getting to 70, but once there its fine.
    Ermm some times it's fine then maybe the odd time and I mean the odd it will struggle?

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    Regular Member Caveman_nige's Avatar
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    Vehicle : Vectra and a Signum

    Trim : top of the line in both

    Engine : Z18XE,Z19DTH,Z20NET

    Year : 2006

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    its best to get it plugged in somewhere to see what fault codes it has, if it has any it could save you a lot of guess work and money... If you do not have a code reader or opcom you could always try the 'diy' method... with the fault codes it can make life a lot easier.

    to read the codes without a tool just get in and press both brake and accelerator pedals to the floor.
    Turn ignition to position 2
    Release only the accelerator pedal and then re-apply to the floor.
    Now holding both pedals down, turn key to position 1 and then back to position 2
    The engine warning lamp will blink out the codes with a gap between discreet code numbers.
    When the light comes back on steady, all codes have been blinked out and you can release both pedals and remove the key.




    Simply count the number of flashes and that will construct the 4 digit code.

    Write down the numbers as they flash out, unless you have a good memory.

    eg

    If the sequence of the flashes is

    10 flashes
    3 flashes
    10 flashes
    2 flashes

    the code is 0302, and looking that up would give - Cylinder 2 Misfire Detected

    etc

    [code reading how2 previously copied from a previous post made by a member on here]

  9. #9
    Regular Member rushy's Avatar
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    Vehicle : SRi


    Engine : Z22SE (2.2 Petrol)

    Year : 2004

    Mileage : 137000

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    Sorry Nige, it doesn't work on the 2.2.

    Betty, not sure if your aware but the 2.2 direct suffers from a high rate of failure to the fuel pump and fuel pressure regulators. The pump is an expensive fix. You say the garage that sold you the car said it had a faulty 02 sensor, then they should fix it IMO. The more sceptic minds would think they don't actually know or there telling you one thing when they could know its a more expensive fault.

    Not saying it isn't the O2 but the pumps fail far far more than the lambda, to the point where (and I might get shot down for this) all siemens pumps will and do fail eventually.

    I hope I'm not scare mongering, but you need to get this nipped in the bud quick smart, if you've just bought it then you still have rights.

    The symptoms of a failing pump is stuttering/struggling above 2000-2500 rpm and any hard acceleration.

    A VX diagnostic will cost far more than a good new lambda, so you could go down that route and change that first off.

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