Question about 2005 Nissan Altima
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Posted on Jan 02, 2017
You may want to have someone else take a look at it. The Nissan P1800 trouble code is not a transmission control problem. It is described as follows:
Trouble diagnosis name: VIAS control solenoid valve circuit.
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
Check your vacuum hoses to make sure they are in good shape and are securely attached Aslo check the wiring harness is ok and securely attached as well. If they are, you’ll probably need to replace your VIAS. It's right next to the throttle body.
Posted on Jan 25, 2010
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