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Thread: U480 Code Reader

  1. #1
    Join Date
    Dec 2007
    Location
    London
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    371

    Question U480 Code Reader

    Has anyone found this cheap code reader useful?

    It seems to connect, but hasn't retrieved any stored faults on my car, even though the Engine Light was on recently (it cleared after disconnecting the battery but before using the reader).
    Paul
    Pure 2000 W, LHD 599cc - Engine Rebuilt Feb 08 - sold
    Passion 2000 W, LHD 599cc - Engine Rebuilt Mar 09 - sold
    Passion 1998 T, LHD 599cc - Engine Rebuilt Apr 10 - sold
    Cabrio 2001 Y, LHD 599cc - Engine Rebuilt Jul 10 Replaced Oct 16

  2. #2
    Join Date
    Feb 2011
    Location
    Lewes
    Posts
    710
    Disconnecting the battery will clear all codes. If they persistent ones, they will come back. So your warning light will be on again if the engine management deems the errors are critical.

    Most generic code readers will only be able to read engine error codes and sometimes even those badly: My cheap bluetooth one said I had a misfire on cylinder 5 at one point!

    John

  3. #3
    Join Date
    Dec 2007
    Location
    London
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    371
    Thanks, I was hoping it would tell me if there had been a fault with the used Boost Control Solenoid I fitted, as the engine is very sluggish.

    I haven't done a compression test yet, but I doubt there's a problem there. Sticky wastegate arm - maybe.
    Paul
    Pure 2000 W, LHD 599cc - Engine Rebuilt Feb 08 - sold
    Passion 2000 W, LHD 599cc - Engine Rebuilt Mar 09 - sold
    Passion 1998 T, LHD 599cc - Engine Rebuilt Apr 10 - sold
    Cabrio 2001 Y, LHD 599cc - Engine Rebuilt Jul 10 Replaced Oct 16

  4. #4
    Join Date
    Apr 2009
    Location
    Ecosse
    Posts
    3,569
    As per post#2, battery disconnect banishes codes.
    When I had my boost control solenoid fail the symptoms were stronger than usual engine torque followed swiftly by limp mode. Disconnecting battery just allowed the process to repeat. When my wastegate arm was sticky it stuck open - no boost. Easily checked by manipulating it by hand.

  5. #5
    Join Date
    Dec 2007
    Location
    London
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    371
    Very useful thanks.

    About to start on the front suspension (broken springs worn shocks), wish me luck.
    Paul
    Pure 2000 W, LHD 599cc - Engine Rebuilt Feb 08 - sold
    Passion 2000 W, LHD 599cc - Engine Rebuilt Mar 09 - sold
    Passion 1998 T, LHD 599cc - Engine Rebuilt Apr 10 - sold
    Cabrio 2001 Y, LHD 599cc - Engine Rebuilt Jul 10 Replaced Oct 16

  6. #6
    Join Date
    Dec 2007
    Location
    London
    Posts
    371
    So after the Engine Check light decided to illuminate today, I thought I'd plug in the uber cheap diags tool

    Three faults reported

    Petrol tank sensor - Yup, it is pants

    O2 sensor 1, bank 1
    O2 sensor heater 1, bank 1

    After clearing the faults the O2 sensor faults were marked as pending

    But the engine check lamp was cleared

    I have a later 450 with two lambdas, which one does the diags think is at fault?

    Is it worth swapping one of them with a spare?

    Are they both the same?

    Many thanks
    Paul
    Pure 2000 W, LHD 599cc - Engine Rebuilt Feb 08 - sold
    Passion 2000 W, LHD 599cc - Engine Rebuilt Mar 09 - sold
    Passion 1998 T, LHD 599cc - Engine Rebuilt Apr 10 - sold
    Cabrio 2001 Y, LHD 599cc - Engine Rebuilt Jul 10 Replaced Oct 16

  7. #7
    Join Date
    Nov 2007
    Location
    BANCHORY
    Posts
    3,232
    O2 Sensor Heater burnt out. Confirm by measuring its resistance. I bet you need a new O2 sensor.
    Drives a Smart Cdi - 65 to 85 MPG

  8. #8
    Join Date
    Dec 2007
    Location
    London
    Posts
    371
    Any chance it could be the cause of the blipping idle?
    Paul
    Pure 2000 W, LHD 599cc - Engine Rebuilt Feb 08 - sold
    Passion 2000 W, LHD 599cc - Engine Rebuilt Mar 09 - sold
    Passion 1998 T, LHD 599cc - Engine Rebuilt Apr 10 - sold
    Cabrio 2001 Y, LHD 599cc - Engine Rebuilt Jul 10 Replaced Oct 16

  9. #9
    Join Date
    Dec 2007
    Location
    London
    Posts
    371
    Quote Originally Posted by tolsen View Post
    O2 Sensor Heater burnt out. Confirm by measuring its resistance. I bet you need a new O2 sensor.
    I fitted the spare used sensor, cancelled the errors, and now it's all good

    I correctly guessed that Sensor1 Bank1 was the turbo mounted sensor rather than the exhaust mounted sensor

    It even smells better now, I bet the sensor had been faulty for some time before the engine light came on
    Paul
    Pure 2000 W, LHD 599cc - Engine Rebuilt Feb 08 - sold
    Passion 2000 W, LHD 599cc - Engine Rebuilt Mar 09 - sold
    Passion 1998 T, LHD 599cc - Engine Rebuilt Apr 10 - sold
    Cabrio 2001 Y, LHD 599cc - Engine Rebuilt Jul 10 Replaced Oct 16

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