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Thread: diagnostic help

  1. #1
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    Default diagnostic help

    advice please..my dad owns a vectra 1.8(z18xe) engine light came on.took it vauxhall...codes p0130 p0335 p1555 p0170 flashed up...had o2 sensor replaced...centre exhaust replaced and cranksensor replaced total £236.54 got car home and light came on...took it back and after 3 days at vauxhall and having an expert on it they now say its ecu..quoted £900...so i got a second hand one off ebay with transponder and chip..plugged it in and started...still engine light..can anyone help me before scrapping the car..and can i complain to vauxhall?

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    Vehicle : CDTI 150

    Trim : Design

    Engine : Z19DTH

    Year : 2005

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    P0130 O2 sensor circuit malfunction
    P0335 Crankshaft Position Sensor
    P1555 Throttle Position sensor, MAF sensor implausible signal.
    P0170 Fuel Trim Malfunction

    Quite a mixed bag, twitchy ECU has been known to cause random issues, but you've eliminated that.

    What fault codes are present at the moment?? Are they still the same??
    Does the car otherwise run ok??

    P1555 can be caused by vacuum pipe blockages or splits and leaks in the air intake (can also give P0170).
    Could also be the throttle body.
    Check the smalller of the pipes that goes from the rocker cover to the throttle body for blockage/split, also ensure the union that the pipe attaches to, that goes into the throttle body is not blocked; I use a safety pin thats been opened out.
    Check the ducting from the MAF to the throttle body for splits.
    There is also a vacuum pipe that curves around and attaches to the air filter box, check for splits.

    Hope this helps

  3. #3
    Regular Member Jezzy's Avatar
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    You're getting P1555 but no mention of replacing or cleaning the MAF sensor; if this is the case then give it a clean.

  4. #4
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    Vehicle : CDTI 150

    Trim : Design

    Engine : Z19DTH

    Year : 2005

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    Agree with Jezzy, forgot the MAF; a bottle of Hobgoblin or three.................

  5. #5
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    Default

    ok willtry cleaning everything..but since changing ecu engine light off but spanner light going through a car is on now..can figure it out

  6. #6
    Administrator plasma's Avatar
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    Vehicle : Vectra

    Trim : SRi

    Engine : 150

    Year : 05

    Mileage : 74000

    Default

    needs to be read to see why it isnt happy, if its a new ECU maybe its not been fully coded properly or mismatched with another item.
    Plasma's Tech2 services are now open and able to provide services

  7. #7
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    Vehicle : CDTI 150

    Trim : Design

    Engine : Z19DTH

    Year : 2005

    Default

    Spanner light through car is SVS (Service Vehicle Soon).
    The 'ECU' light (picture of engine) is the MIL (Malfunction Indicator Light).
    Still needs the fault code reading, for instance the SVS will illuminate for DTC P1555.
    Once you've cleaned the MAF, by spraying Isopropyl Alcohol on to the fine wires, you will need to either have the fault codes cleared or disconnect the batteryfor 30 mins (make sure you have the radio code) or operate about 50 starts with no fault conditions.

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