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P1800 2005 Nissan Maxima Code - Variable Intake Air System Control Solenoid Valve Circuit

- Code Popularity: 15,333 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P1800 2005 Nissan Maxima?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Variable Intake Air System (VIAS) Control Solenoid Valve
  • VIAS Control Solenoid Valve circuit harness is open or shorted
  • VIAS Control Solenoid Valve circuit poor electrical connection
⚠ Does your Nissan have Safety Recalls? → Check here

How to Fix the DTC P1800 2005 Nissan Maxima?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes





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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1800 2005 Nissan Maxima code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P1800 2005 Nissan Maxima Description

When the engine is running at low or medium speed, the power valve is fully closed. Under this condition, the effective suction port length is equivalent to the total length of the intake manifold collector's suction port including the intake valve. This long suction port provides increased air intake which results in improved suction efficiency and higher torque generation.
The surge tank and one-way valve are provided. When the engine is running at high speed, the Engine Control Module (ECM) sends the signal to the Variable Intake Air System (VIAS) control solenoid valve. This signal introduces the intake manifold vacuum into the power valve actuator and therefore opens the power valve to two suction passages together in the collector.
Under this condition, the effective port length is equivalent to the length of the suction port provided independently for each cylinder. This shortened port length results in enhanced engine output with reduced suction resistance under high speeds.
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. The Diagnostic Trouble Code (DTC) will be set when an excessively low or high voltage signal is sent to ECM through the valve

OBDII Code P1800 2005 Nissan Maxima - Variable Intake Air System Control Solenoid Valve Circuit - AutoCodes.com
P1800 2005 Nissan Maxima Code - Variable Intake Air System Control Solenoid Valve Circuit

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