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Thread: 2.0 T signum lambda woes

  1. #1
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    Vehicle InfoStats

    Vehicle : Vauxhall Vectra

    Trim : Sri

    Engine : Z30dt

    Year : 2005

    Mileage : 104000

    Angry 2.0 T signum lambda woes

    hi i recently bought my signum 2.0t. when driving the car home i noticed the engine management light was on and car was under powered.
    when i got back home i plugged the car into my laptop and it came up with the code

    P0134 02 sensor circuit no activity detected (bank 1 Sensor 1)

    i then lifted the bonnet to find that the lambda has been connected to the car simply by twisting the wires together and without a proper plug. i retwisted the wires together for now, cleared the code.

    Car still felt underpowered so thought sensor must be shot.
    while on my way to get a new sensor car sprang into life and had a turbo again. it had never had that sort of power since i first drove it. checked the codes and none present.

    next day car felt underpowered checked the codes again same code but this time a pending code. so cleared it again.

    Today the eml light has came back on again so checked codes again and this time

    P0134 02 sensor circuit no activity detected Bank 1 sensor 1
    P0138 02 sensor circuit high voltage Bank 1 sensor 2

    the previous owner says that sensor 2 has already replaced but i dont have a receipt for this.

    looking at the live data
    sensor 1 when actually working is running between 0 and 0.8v
    sensor 2 is running 0.1 and 1.025v

    so do you wonderful people think the twisted wires r at fault for sensor 1 inactivity or the actual sensor as wiring hasnt been disturbed and all connections are taped separately so as not to short. and because the sensors not running correctly this is causeing sensor 2 to run at high voltage to compensate for the inactivity of sensor 1

    thanks in advance for you comments

    cheers chris

  2. #2
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    Vehicle : Vauxhall Vectra

    Trim : Sri

    Engine : Z30dt

    Year : 2005

    Mileage : 104000

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