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Thread: Emissions light

  1. #1
    Regular Member iain.condliffe's Avatar
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    Default Emissions light

    Hi all,

    My emissions light has recently come on. It has given the fault code p0400 5a which is EGR flow insufficient. Prior to this the car failed it's mot on smoke, it got through with a new fuel filter and a tin of 44k additive.

    I have cleared this and unsurprisingly it came on again about 24 hours later. So, am I right in thinking the following:

    The EGR valve needs cleaning with carb cleaner as per the how 2s and the gasket replacing with the fiat type.

    Or do I replace the valve outright?

    The car is a cdti 120 and has done 31000 miles.

    And to top it off the drivers dip beam went too!

    Thanks in advance.

  2. #2
    Full Member merikiito's Avatar
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    Vehicle : Insignia CDTi SRi NAV 160

    Trim : SRi

    Engine : A20DTH

    Year : 2009

    Mileage : 88000

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    I think you have answered your own question, clean it then replace if that doesn't work
    Lois Griffin: Peter! You're bribing your daughter with a car?
    Peter Griffin: Ah, c'mon, Lois, isn't 'bribe' just another word for 'love'?

  3. #3
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    Default Exhaust gas recirculation flow insufficent

    hi i have the same code on my car but i have cleaned it but i have a tuning box on so any help would be appreciated

  4. #4
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    Default

    how long after cleaning the egr valve should the engine gas light go out?

  5. #5
    Regular Member rich r's Avatar
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    Default

    It'll go out when you clear the fault code Then assuming flow is fine, it won't log the fault. I'm not sure if this code clears itself after so many starts or whether it's a permanent one that needs to be cleared with a code reader.

  6. #6
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    Vehicle : vectra c

    Trim : ls

    Engine : 1800

    Year : 04

    Mileage : 132000

    Default

    try this also
    i have couple of threads on this

    check the egr solenoid

    http://www.vectra-c.com/forum/showth...ult-code-P2279

    post 8


    also post 3 below
    http://www.vectra-c.com/forum/showth...2279-grrrrrrrr

  7. #7
    Regular Member m8internet's Avatar
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    Quote Originally Posted by rich r View Post
    I'm not sure if this code clears itself after so many starts or whether it's a permanent one that needs to be cleared with a code reader
    The Emissions Warning Light is a reactive warning
    Once activated it puts the engine into Safe Mode which applies for 12 hours, the light then stays on for three more engine starts
    The next time it applies for 24 hours
    The next time it applies for 48 hours
    The cycle then repeats

  8. #8
    VIP-Member Ozyboyross's Avatar
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    Vehicle : Vectra C

    Trim : SRi XP

    Engine : 1.9 CDTi 150

    Year : 2006

    Mileage : 90k

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    Quote Originally Posted by m8internet View Post
    The Emissions Warning Light is a reactive warning
    Once activated it puts the engine into Safe Mode which applies for 12 hours, the light then stays on for three more engine starts
    The next time it applies for 24 hours
    The next time it applies for 48 hours
    The cycle then repeats
    I doubt it.... I've had my egr unplugged for about a month now and I've never had limp mode and the emissions light stays on continually?

    So I can't see why it would cycle through or throw up limp mode?


    2006 Vectra SRi XP 1.9 CDTi 150 - If you cant make it right, make it shiny!

  9. #9
    Regular Member m8internet's Avatar
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    Quote Originally Posted by Ozyboyross View Post
    I've had my egr unplugged for about a month now and I've never had limp mode and the emissions light stays on continually?
    This is with the EGR Valve still connected
    On the Y30DT engine it is a nightmare to access
    I eventually realised the cycle being applied, presumably to make it more obvious to the owner / driver

  10. #10
    VIP-Member Ozyboyross's Avatar
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    Vehicle : Vectra C

    Trim : SRi XP

    Engine : 1.9 CDTi 150

    Year : 2006

    Mileage : 90k

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    Quote Originally Posted by m8internet View Post
    This is with the EGR Valve still connected
    On the Y30DT engine it is a nightmare to access
    I eventually realised the cycle being applied, presumably to make it more obvious to the owner / driver
    Ah I see lol I was just explaining how its reacted on my car

    Wish I had a 3.0 cdti though lol


    2006 Vectra SRi XP 1.9 CDTi 150 - If you cant make it right, make it shiny!

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