Question about 2005 Nissan Titan
When putting the truck in drive the automatic transmission check light and service engine light comes on, the truck also appears to drag upon take off and feels if it skips or shifts even though it an automatic transmission while driving. I have had a new transmission control valve put on but the problem is still there. this beappening after i installed a tow hitch, tow harness and brake contol towing unit on the truck. does this has anything to do with the body control module sub harness or a brake control unit installation? please help.
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Posted on Jan 02, 2017
Tips for a great answer:
following are the general instructions on the start of diagnosing any
electronically controlled engine or transmission problem.
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. Also engine mechanical problems ca cause many
drive-ability related problem such as rough idle and other symptoms
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