P0325 and P1441

MayoMan · **Joined:** Tue May 01, 2007 2:27 pm **Posts:** 4

MIL Light on with the following:
P0325 Knock Sensor 1 Circuit (Bank 1 or Single Sensor)
P1441 Unknown Trouble Code Description

2001 Nissan Frontier 3.3 liter V-6 (not supercharged)
139K mileage, Auto transmission, 2 Wheel Drive

Any help on the P1441 and fixing this? MIL seems to come in, go off after requisite number of drive cycles, then come back on (3 or 4 week cycle). Have info from freeze frame if that helps.

Sponsored Links · **Joined:** 29 Jun 2004 08:12 pm **Posts:** N/A

dennisdirk1 · **Joined:** Thu Dec 06, 2007 5:39 pm **Posts:** 16

Yes p1441 is a evap code small leak I belive

Darkrooms · **Joined:** Thu Mar 29, 2007 9:44 am **Posts:** 1424

and now for the fix: the ECM uses a pressure sensor to watch the system and see that there are no leaks. If it sees a leak via the pressure sensor, it sets this code. The ECM wants to see the pressure sensor voltage drop down, indicating that there is vacuum on the system, and it wants it to be able to hold this vacuum for at least 30 seconds. If this does not happen, it will set a code. As a note, the vent solenoid is the most common failure on these systems

MayoMan · **Joined:** Tue May 01, 2007 2:27 pm **Posts:** 4

Many Thanks...

P0325 and P1441

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