Question about 2000 Volkswagen Passat 4Motion

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My car wont start when engine is warm - 2000 Volkswagen Passat 4Motion

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Hi if your car starts fine when cold but then runs rough when warm then wont start this points towards the oxygen sensor ( or lamda sensor for its proper name) being at fault, if your sensor in the exhaust comes before the catalytic converter then i would say its the sensor at fault how ever if the cat comes first then it could be that that is at fault.
your best option would be to have a diagnostic check done so your not wasting monery buying parts you might not need.

let me know how you get on or if you need further assistance ok

Posted on Apr 28, 2010

Testimonial: "thanks very useful ill try a dianostic as well"

  • Greg Stefan May 26, 2010

    Usually O2 sensor set a code (check engine light comes on) those cars are very sensetive to it.
    Without proper diagnostics hard to say anything.
    The only thing that goes bad on those VAG vehicles without warning is MAF sensor.Can stuck on rich mode .Starts ok cold , but mixture too rich to start the engine when warmed up.

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