Hello The
engine and the automatic transmission (transmission control is only
for automatics, engine is still computer controlled no matter the
transmission type) in this vehicle are computer controlled and in
most cases when a fault occurs a fault code is stored in the memory
of the computer control module. There are exception to this, such as
the Mass Airflow Meter and fuel pressure problems. What must be done
is to have all the basic testing done such as a scan of the system
for fault codes as well as a check with a live data scanner tool for
engine functions that are not within range of normal, a trained
technician is required to know what is correct and what isn't, then
based on careful diagnostics done from a factory repair manual the
correct part is replaced or the wiring repaired or the computer
replaced (known as the PCM), which is very rarely the problem. Other
basic checks must be done as well such as mechanical problems with
the engine as well as engine state of tune and mileage on the engine.
The transmission can have mechanical issues as well such as no gear
engagement at all or a failed pump or other pressure related
problems.
hi thanks for the reply the car has 103.000 miles on it i recently did a tranmission oil and filter change thats when is started but my mechanic is teling me that its not the tranmission cause it will send a code which the car shows no code it idles good in park has a very slight miss on park but when in drive it vibrates and some times when i stop at a light it shots off on me still doesn't sends a code could it be a vacume leak?
2000 a6 2.8 awd
avant
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