Question about 2004 Nissan Quest
Vias solenoid valve p1800
Posted by Anonymous on
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Best to remove the front passenger side wheel. Then snap out the clips that are holding the plastic cover towards the front. Now it will expose the belt area. Loosen the locking nut of the tensioner(idler) pulley located to the right of the Crankshaft Pulley. Crankshaft pulley is the one that handles both belts (alternator and the power sterring pump). Right to that next to it, upwards is the idler pulley. You will find the alternator pulley to the right of that further up. Open the hood of the van and locate the adjusting nut behind the alternator on the idler pulley from top and loosen that as well. Once both these are loosened, belt will loosen and will be easy to remove. Now replace it with the new belt the same way it was wrapped. Go over the crankshaft pulley; under the A/C compressor pulley; over the alternator pulley; under the idler pulley. tighten the adjusting nut from the top through the hood until the play on the belt (when pressed in) is less than 1 inch. Now lock the tensioner pulley by tightening the locking nut. Start and run the car for 15 mins to see if everything is ok.
Posted on Jan 22, 2011
SOURCE: 2002 nissan maxima, check engine
About DTC P1800, I suggest check the harness and verify it is plugged in and still functioning.
Also, try checking your vac tubes to verify that they are not reversed. Also read this TSB with details about correct diagnostic: DTC P1800 VIAS CONTROL SOLENOID VALVE
The VIAS control solenoid valve cuts the intake manifold vacuum signal for power valve control. It responds to ON/OFF signals from the ECM. When the solenoid is off, the vacuum signal from the intake manifold is cut. When the ECM sends an ON signal the coil pulls the plunger downward and feeds the vacuum signal to the power valve actuator.
DTC detecting condition:
• An excessively low or high voltage signal is sent to ECM through the valve
• Harness or connectors (The solenoid valve circuit is open or shorted.)
• VIAS control solenoid valve
Will need replaced the solenoid valve (P/N - 149558J10A). The valve is located under the engine cover. It's a Nissan only part so you have to order from the dealer, either online or in person. It's cheaper online. Check this sample Nissan engine location (click image for zoom)...
DTC P1147 - Bank1 Sensor 2 O2 sensor maximum voltage monitoring
Component Description: The heated oxygen sensor 2, after three way catalyst, monitors the oxygen level in the exhaust gas on each bank.
Even if switching characteristics of the heated oxygen sensor 1 are shifted, the air fuel ratio is controlled to stoichiometric, by the signal from the heated oxygen sensor 2.
This sensor is made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. Under normal conditions the heated oxygen sensor 2 is not used for engine control operation.
DTC detecting condition: The maximum voltage from the sensor is not reached to the specified voltage.
Harness or connectors (The sensor circuit is open or shorted)
Heated oxygen sensor 2
Majority of cases this is either a faulty O2 sensor, or short/open in wiring harness. Bank1 sensor2 is the rear O2 sensor on the passenger (right) hand side (click image for zoom):
Here is simple test with voltmeter to test O2 sensor. If it fails test, replace sensor. If not, then you will have to start tracing the wiring harness for a short/open in it (click for zoom):
And here additional details: DTC P1147 O2 Sensor
Keep us updated.
Posted on Aug 01, 2011
Tips for a great answer:
Jan 16, 2018 | Nissan Cars & Trucks
Mar 02, 2017 | Nissan Maxima Cars & Trucks
Feb 01, 2013 | Cars & Trucks
Aug 29, 2012 | 2005 Nissan Quest
Aug 29, 2012 | 2005 Nissan Quest
Jul 13, 2012 | Cars & Trucks
Apr 23, 2010 | 2002 Nissan Altima
Jan 25, 2010 | 2002 Nissan Altima
319 people viewed this question
Usually answered in minutes!