With only 2500 miles!! all of the sudden the dreaded limp mode.
Car is sitting on the garage, looks and smell new.
I started do investigate the issue, read any article referencing the error codes
1- checked the voltages on APP pin 4 to ground, getting => 4.49 v
2- checked the voltages on APP pin 4 to sensor ground return 1, getting 0.28 +/- 0.30 v
3- checked the voltages on APP pin 6 to ground, getting => 0.00 to 0.05 v
4- checked the voltages on APP pin 6 to sensor ground return 3, getting 0.00 +/- 0.05 v
Next I will be testing for continuity between the accelerator pedal pin 5 or FPS MAIN and the ECU pin 106 but haven't done that yet.
Bought a genuine NOS OEM 3F 18919-AM810 APP Sensor 18919AM810, swapped it... to no avail.
I read a post on https://my-secure.justanswer.com/que...e.v/5669,6161/ informing that the APP Sensor shares a 5 Volt Reference with the Ac Pressure Sensor, Power Steering Pressure Switch and Evap Pressure Sensor, so I unplugged the Ac Pressure Sensor, ran a test as well.... nothing changed.
I cannot fathom the problem, I don't believe that any of the sensor involved on sharing the 5 volt power input is at fault unless a goddamned rat chewed on some control cables!! since i found some dropping under the grille under body splash shield.
Any thought will be highly appreciated
Thank you
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Hi and welcome!

Your link is broke, please try uploading to G35. Moving your post to the G35 coupe forum, good luck!

Bob

The guide is on a different community but the flow is the same for G35.

https://mbworld.org/forums/test/6199...t-picture.html

 

P2122 - APP circuit 1
P2127 - APP circuit 2
P1421 - Pretty sure this is an invalid code for G35 COUPE for model year 2007. Should have been something introduced with the HR motor but not on the DE motor. Either way ignore the code for now it's almost always caused by ANOTHER problem.
P1705 - Again, more codes added in 2007 for the HR engine.

Did you mistakenly post that you have a coupe but you actually have a sedan? Also possible you are using an OBD2 scanner that doesn't have the proper protocol 9141-2 needed for these years of Nissan vehicles and the scanner is just hunting for the next closest answer.

Either way, sounds like you definitely have an APP problem, pin 6 should also have 5vdc so there's something wrong on that circuit, probe the ECM on pin 90 to verify the voltage is correct at the ECM. If you don't have 5vdc at the ECM pin then disconnect the battery, pull the ECM harness, inspect for any damage or a broken pin. If it's ok then you might have internal breakage on the ECM (sometimes you can fix this stuff if it's broken from the PCB up to the back of the harness). If you have the proper 5vdc then I would just cut the wire and splice in a new one over to the APP because otherwise you're tearing the dash apart to find the broken section. Easier to abandon and pull a new circuit.

 

If you seriously suspect a rat ate the wires then you can just pull a new 6 conductor wire between the APP and ECM and just cut/splice all of them.

Irrigation cable is cheap, you can get it in a 6 conductor, copper conductors, and it has a nice tough outer jacket that's very abrasion resistant since it's designed for direct burial. Since this is cabin wiring it doesn't need to be oil/gasoline resistant. Just be sure to solder any splices, if you aren't comfortable doing solder work then look up "solder shrink tube" it has a little bit of low melting point solder inside the shrink tube so as you heat it up it automatically melts the solder. They work decently.