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Tim Mohr
Tim Mohr, ASE MASTER TECH
Category: Nissan
Satisfied Customers: 560
Experience:  30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL
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I got a code for p1105, nissan pickup 1997, i scanned it and

Customer Question

i got a code for p1105
JA: Just to clarify, what's the exact code? And have you tried to reset it?
Customer: nissan pickup 1997
JA: Are you fixing your Pickup yourself? What have you tried so far?
Customer: i scanned it and the hg is at 31 not moving at all
JA: Anything else you want the mechanic to know before I connect you?
Customer: no why
Submitted: 2 months ago.
Category: Nissan
Expert:  Super mechanic replied 2 months ago.

Hello and welcome. My name is ***** ***** you for visiting the site, I am reviewing your question and will reply shortly, thanks.

Expert:  Super mechanic replied 2 months ago.

Which engine, 2.4?

Customer: replied 2 months ago.
2.4 rwd
Customer: replied 2 months ago.
manual trans
Expert:  Super mechanic replied 2 months ago.

I see, thanks. There was a factory service bulletin for the scan tools not reading the correct amount from the sensor. However, it could be that the sensor itself is bad, or the solenoid valve, (stuck/clogged) is bad.

You may need to monitor the absolute pressure sensor voltage on a 1997 Truck, monitor the blue (L) wire between the absolute pressure sensor (terminal # 2) and ground or the ECM (terminal # 57) and ground with a digital multimeter.

Customer: replied 2 months ago.
i got 5 v when i tested it .
Customer: replied 2 months ago.
i also tested my other truck and got the same voltage but that truck is fine
Customer: replied 2 months ago.
replaced it once
Customer: replied 2 months ago.
now i thought there wasn't vacuum but i disconnected the hose and there was. as soon as i disconnected it the scanner hg went down to 0 and i reconnected it and went straight to 31 not moving anymore from there
Expert:  Super mechanic replied 2 months ago.

Right, that is what the bulletin was put out for, (see previous post) thanks

Customer: replied 2 months ago.
okay, i already did all that and everything is fine
Expert:  Super mechanic replied 2 months ago.

If, "everything" was 'fine' there would not be any code(s) setting, unless the ECM is bad. Does the voltage change when the RPM's are raised, (to about 2500)?