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  1. o2 Sensor Harness

    9-3 Sedan, Cabrio '04+, Combi, 9-3X Workshop
    I've replaced my upstream o2 sensor multiple times and CEL keeps coming on. As it turns out, it's the harness where the sensor connects to the wiring that leads to the computer that is the problem and not the o2 sensor. I can move the harness a little to make a bit of tighter connection, and...
  2. Bank1 Sensor 1 Oxygen sensor connector - what's the secret?

    9-3 Sedan, Cabrio '04+, Combi, 9-3X Workshop
    so I'm changing the front o2 sensor on my '03 9-3 Linear. I've seen several people in the forum have done it. WIS basically says "unplug the sensor." Well, the plug is mounted on a bracket where you don't have good visibility. I've been trying to remove it for almost an hour and I am...
  3. CEL light when cold not after warming

    NG900 & OG9-3 Workshop
    How it goes: When starting in the morning (cold engine), after a minute or two, the engine will stutter, a bit like it is fuel-starved, if I press the pedal, power is very low, some misfiring and I get a CEL and sometimes a flashing CEL, OBDII says: P0132 and P0138, sometimes a P0300 (after a...
  4. ECU fault?

    C900 Workshop
    My 900i gives me two fault codes in idle warm condition: 12112 incorrect air-fuel ratio at idle 12223 air-fuel mixture too lean This is inconsistent with a lambda sensor reading of 0,9 Volt. The car drive 6 km/liter. The high fuel consumption is consistent with the lambda reading. I have...
  5. Codes from Mechanic

    9-5 Workshop
    I just had my 2000 9-5 Wagon SE V6 3.0L in the shop for annual safety/emissions testing. The mechanic connected his hand held code reader to my car and it came back with three faults. The first said "02 Sensor" The second said "Catalyst" The third said "Component" I'm pretty sure that the...
  6. Bank1 Sensor 1 Oxygen sensor heater circuit

    9-3 Sedan, Cabrio '04+, Combi, 9-3X Workshop
    I have light come on randomly ALL THE TIME. some times it will come on when i start the car, somtimes after driving and Sometimes not at all (ideal condition ha) the car runs and acts perfecly normal. but being as picky as i am i replaced the 02 sensor with one from eeuroparts and the light is...