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    Default engine management

    hi everyone..... i was wonder if anyone could help me....

    the engine management light on my vectra c 1.8 05plate

    the code is po136 - generic o2 sensor circuit malfunction (bank 1 sensor 2)

    is that mean the lambdo sensor???

    also other code is c1555 - GM DTC definition not found please refer to vehicle service manual

    what that mean???

    if anyone would help that would be cheerful and useful

    thanks

  2. #2
    VIP-Member Das's Avatar
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    Vehicle : Lada

    Trim : Riva

    Engine : 6.0 V12

    Year : 1954

    Mileage : 567890987

    Default

    Yes the 0136 is the 2nd lambda sensor.

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    Regular Member Critch's Avatar
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    Vehicle : Mk1 renault scenic... I know I know but it drives

    Trim : Basic

    Engine : 1.6 16v

    Year : 2003

    Default

    It's front O2 sensor heater circuit.

    can test with a multimeter expect 4-8ohms

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    Default

    great thanks but which one front or second lol

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    Regular Member Critch's Avatar
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    Vehicle : Mk1 renault scenic... I know I know but it drives

    Trim : Basic

    Engine : 1.6 16v

    Year : 2003

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    That code is generic code for front heated O2 sensor

    but testing across the 2 white wire with ohm meter will prove it

    9/10 they go open circuit

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    VIP-Member Das's Avatar
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    Vehicle : Lada

    Trim : Riva

    Engine : 6.0 V12

    Year : 1954

    Mileage : 567890987

    Default

    I was under the impression position 1 was pre cat and position 2 post cat?

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    brills i will check tomorrow also i need new radiator becuase just had burst it after fitted new thermostat but radiator look bit rusty on edge so anyway....... so what i do it i will go scrappy get radiator and some spare for vectra and will test the lambdo sensor will update tomorrow thanks again for help

  8. #8
    Regular Member Critch's Avatar
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    Vehicle : Mk1 renault scenic... I know I know but it drives

    Trim : Basic

    Engine : 1.6 16v

    Year : 2003

    Default

    Whoops that's my bad. Just checked and you are correct it's rear O2 ie post cat.

    and it's also relating to the actual operation of sensor so would need to reading voltages.





    Taxi for one please! :couch:





    Right ill stop assuming I know codes and check next time

    some info they may or may not help
    Over 450mv is reading rich so commanding lean and below 450mv is lean so commanding rich

    best way to check if its reading rich cause a lean condition ie create a vac leak

    if it's reading lean spray some carb cleaner into intake.

    voltages should adjust accordingly in under 100ms

    also go for drive check that it goes into closed up.

    Rev to wide open throttle and see what happens to O2 voltage.

  9. #9
    VIP-Member Das's Avatar
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    Vehicle : Lada

    Trim : Riva

    Engine : 6.0 V12

    Year : 1954

    Mileage : 567890987

    Default

    Only reason I know that code is mine throws it about once a fortnight critch, lol. 0036 is the heater and 0136 is the actual operation. Been like this for the 2 1/2 years ive had it, just waiting for the flexi to finally give up the ghost and ill buy a new one to put in the new front pipe i have in the loft.

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