306 oxygen sensor replacement
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Thread: 306 oxygen sensor replacement

  1. #1
    Member bmr306's Avatar
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    Default 306 oxygen sensor replacement

    Hey All,

    Can i get some help in locating the oxygen sensor for replacement in my 99 306 as the car keeps cutting out.

    Thanks for your help


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    99 N5 306 Style. RIP

  2. #2
    1000+ Posts jo proffi's Avatar
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    Usually, lack of air causes a car to stall.

    Jo

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    1000+ Posts pgti6's Avatar
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    Is it a 1.8 litre 16V?
    It'll be screwed into the engine pipe between the exhaust manifold & catalytic converter.
    Track car-Steel Grey 405 Mi16 2.2 litre


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    sans witticism SLC206's Avatar
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    The oxy or lambda sensor is located in the exhaust - aft of the engine and forward of the catalytic converter.

    306 oxygen sensor replacement-306lambda.jpg
    Regards,

    Simon

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    1000+ Posts Andrew Ch's Avatar
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    Hi Brian

    Have you had the rest of the symptoms associated with a dodgy oxy sensor eg. rough running, horrific fuel economy etc ? If it is only stalling perhaps it may be another item. For instance if it stalls at idle it may be the Idle Air Control Valve.

    Cheers

    Andrew

  6. #6
    Veni Vidi Posti 68 404's Avatar
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    Quote Originally Posted by jo proffi View Post
    Usually, lack of air causes a car to stall.

    Jo
    That's helpful

    Dave
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  7. #7
    Contented Peugeot Driver addo's Avatar
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    True for aircraft as well.

    An oxygen sensor won't make the car stall; it will log a result of being consistently out of spec and the ECU will default to a rich pattern (map) for the fuel injection. Shorting out the sensor feed voltage might cause hiccups, but this would be easily tested by unplugging the sensor.

  8. #8
    1000+ Posts jo proffi's Avatar
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    Quote Originally Posted by 68 404 View Post
    That's helpful

    Dave
    Fair enough, I was trying to keep it really really simple.
    Jo
    68 404 likes this.

  9. #9
    Member bmr306's Avatar
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    Quote Originally Posted by pgti6 View Post
    Is it a 1.8 litre 16V?
    It'll be screwed into the engine pipe between the exhaust manifold & catalytic converter.
    Its 1.8L
    99 N5 306 Style. RIP

  10. #10
    Member bmr306's Avatar
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    Quote Originally Posted by SLC206 View Post
    The oxy or lambda sensor is located in the exhaust - aft of the engine and forward of the catalytic converter.

    Click image for larger version. 

Name:	306lambda.jpg 
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    thanks for the pic, where did you find this?
    99 N5 306 Style. RIP

  11. #11
    Member bmr306's Avatar
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    Quote Originally Posted by Andrew Ch View Post
    Hi Brian

    Have you had the rest of the symptoms associated with a dodgy oxy sensor eg. rough running, horrific fuel economy etc ? If it is only stalling perhaps it may be another item. For instance if it stalls at idle it may be the Idle Air Control Valve.

    Cheers

    Andrew

    Thanks for the replay - the car is just cutting out, but i fuel economy is on the way. ill look into replacing/ a good clean for the "Idle Air Control Valve".
    99 N5 306 Style. RIP

  12. #12
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    Certainly check the stepper motor and clean the valve, but I've had another thought - does the 306 gearbox share a feature with the 405? In that car there is a rotation sensor inside the speedo drive take-off. It tells the system the car is in motion. The wires give it away. If it has failed the motor stalls whenever you idle up to an intersection, red light, etc.

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