2001 - 4.0L V6. What are the probable causes of DTC P0745?

4 engines non told, (it tells tranny that is there)
I assume shift links not bad PRNDL, but if P works and D so must R
a/t box 4T45e I guess. or 6T40 or 6t is six speeds.

1. check fuses.
2. scan the PCm for P0700 errors for tranny
3. check line pressure per service manual I have it. can tell it but takes 400 psi gauge, but here is spec for Reverse.
4. vac port at 0hg vac, 255 psi min.
5. vac port to 19inches HG, port main 74min.
6. these modern trannys have pressure regulator. that can be bad but gee the scans tell you that if true, not scanning is why you miss all that and tons more. From ATSG manual, 4T45e

here is DTC list, and more ,scan first, or go broke guessing.

DTC P0218
DTC P0562 or P0563
2.4L L4 VIN B Automatic
3.5L V6 VIN K Automatic
3.9L V6 VIN 1 Automatic
3.6L V6 VIN 7 Automatic
3.5L V6 VIN N Automatic
DTC P0601-P0604 or P062F
DTC P0705
DTC P0711-P0713
DTC P0716 or P0717
DTC P0722 or P0723
DTC P0741 or P0742
DTC P0751 or P0752
DTC P0756 or P0757
DTC P0815, P0816, or P0826
DTC P0842 or P0843
DTC P0851 or P0852
DTC P0961
DTC P0973 or P0974
DTC P0976 or P0977
DTC P150C
DTC P1750
DTC P1810, P1816, or P1818
DTC P1811
DTC P1876 or P1877
DTC P2534
DTC P2763 or P2764

miss fire code, press the helpful button and check link below

code p 0108 refers to manifold absolute pressure (MAP) sensor/ barometric pressure(BARO) sensor---high input===causes ---wiring short to positive ---MAP sensor---BARO sensor---ECM
Check /replace the sensors

It is quite possible this is caused by a simple vacuum leak. The first thing I would be doing is checking for such leaks.
You need to do a proper diagnosis. Just start replacing parts as many do and you probably won't stumble on the cause. You need a proper scan done on the vehicle to see what irregularities are evident other than the one fault code.




http://www.obd-codes.com/p0108

http://www.obd-data.com/p0108.html

code p 0745 refers to transmission fluid pressure (TFP) solenoid --circuit malfunction===causes --wiring---TFP solenoid ---ECM/TCM

Most likely your catalytic converter is worn out. If never changed, that is probably it. The other possibility is the engine is not running at the optimum fuel/air ratio, so a tune-up or engine repair is necessary. Here is a link to that code: http://www.obd-codes.com/p0422

Hi William,
On 2000 & some earlier Nissans this problem is very common.
Here is a link to web page that should be helpful to you.
Good Luck JP
P0400 Exhaust Gas Recirculation Flow Malfunction

Something might be wrong with the electrical circuit to the solenoid. Maybe it will help if you go to this site and study the OBDII codes:
http://www.wallpaperama.com/forums/nissan-altima-obdii-trouble-codes-dtc-troubleshooting-list-guide-t425.html

https://www.youtube.com/watch?v=p1DNBthuRM0

P0605 - ECM/ECCS Module, P0740 - TCC Solenoid Valve
, P0745 - Line Pressure Solenoid Valve, P0120 - TP Sensor,

P0745....Pressure Control Solenoid 'A'