Recent content by LenoVan

  1. L

    2001 Audi A4 P1555 code

    You are right. I am living in Vancouver. This car only has 120k KM. There are so much oil inside the engine, so last year, because of the limp mode, it was on fire.
  2. L

    2001 Audi A4 P1555 code

    Thank you. this is a 2001 Audi a4 1.8T in Canada. so "The wastegate may be physically stuck shut, or the mechanism that controls it is." may be the reason?
  3. L

    2001 Audi A4 P1555 code

    Thank everyone for every serious reply, especially to you. I am a new user here so it caused everyone to be troubled by this situation.
  4. L

    2001 Audi A4 P1555 code

    2001 Audi A4 1.8T
  5. L

    2001 Audi A4 P1555 code

    If the actuator doesn’t work, the n75 value is 0? video Here is the record, Maybe the oxygen sensor also has a problem.
  6. L

    2001 Audi A4 P1555 code

    The VCDS shows 'boost pressure control(N75)' values is always 0, the "boost pressure(actual)" and "boost pressure(specified)" value didn't change with the engine speed . so this means I need a new N75?
  7. L

    2001 Audi A4 P1555 code

    Thanks. I have checked the N75 and associated vacuum tubing.it's ok. So air leak is not the reason for "P1555 - Boost pressure Control: Upper Limit Exceeded" ? The pressure cannot be discharged, so the pressure is too high, rather than the leakage of the pipeline, which needs to be supplemented?
  8. L

    2001 Audi A4 P1555 code

    Thanks for your response. Two months ago, When I derived the car the engine light was on, and the engine passenger side has caught fire. I guess the reason is the high temperate in the three-way catalyst and some oil upon it. After this accident, I replaced MAF, the oxygen sensor. Today the same...
  9. L

    2001 Audi A4 P1555 code

    I have bought this car last year. Yesterday when I derived it nearly 10KM, step on the accelerator but kept nearly 2000. I stop and restart, the accelerator is working, but when I derived 2km, the situation happened again. After the next day, when I start the car, some smoke comes near the...
  10. L

    How to check n75 valve?

    Hi, have you solved this problem?
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