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P2078 Code - Intake Manifold Tuning Valve Position Sensor/Switch Circuit High Bank 1

- Code Popularity: 30,744 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P2078?

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 Intake Manifold Tuning Valve Position Sensor/Switch
  • Intake Manifold Tuning Valve Position Sensor/Switch harness is open or shorted
  • Intake Manifold Tuning Valve Position Sensor/Switch circuit poor electrical connection
  • Faulty Intake Manifold Tuning Valve (IMTV)
  • Faulty Intake Manifold Runner Control (IMRC)
  • Faulty Powertrain Control Module (PCM)
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How to Fix the DTC P2078?

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.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2078 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 P2078 Description

The Intake Manifold Tuning Valve (IMTV) is a motorized actuated unit mounted directly to the intake manifold. The IMTV actuator controls a shutter device attached to the actuator shaft. There is no monitor input to the Powertrain Control Module (PCM) with this system to indicate shutter position.
The motorized IMTV unit will not be energized below approximately 2600 rpm or higher on some vehicles. The shutter will be in the closed position not allowing airflow blend to occur in the intake manifold. Above approximately 2600 rpm or higher, the motorized unit will be energized. The motorized unit will be commanded on by the PCM initially at a 100 percent duty cycle to move the shutter to the open position and then falling to approximately 50 percent to continue to hold the shutter open.
The Intake Manifold Tuning Valve (IMTV) system is monitored for failure during continuous, Key ON Engine OFF (KOEO), or Key ON Engine Running (KOER) self-tests. The test fails when the signal is more or less than an expected calibrated range.

OBDII Code P2078 - Intake Manifold Tuning Valve Position Sensor/Switch Circuit High Bank 1 - AutoCodes.com
P2078 Code - Intake Manifold Tuning Valve Position Sensor/Switch Circuit High Bank 1

Need More Information on the Code?

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Information for Specific Makes

  • P2078 Buick Intake Manifold Tuning Valve Position Sensor Circuit High Voltage
  • P2078 Cadillac Intake Manifold Tuning Valve Position Sensor Circuit High Voltage
  • P2078 Chevrolet Intake Manifold Tuning Valve Position Sensor Circuit High Voltage
  • P2078 Chrysler Intake Manifold Tuning Valve Position Sensor/Switch Circuit High Bank 1
  • P2078 Dodge Intake Manifold Tuning Valve Position Sensor/Switch Circuit High Bank 1
  • P2078 Ford Intake Manifold Tuning Valve Position Sensor/Switch Circuit High Bank 1
  • P2078 GMC Intake Manifold Tuning Valve Position Sensor Circuit High Voltage
  • P2078 Jeep Intake Manifold Tuning Valve Position Sensor/Switch Circuit High Bank 1
  • P2078 Lincoln Intake Manifold Tuning Valve Position Sensor/Switch Circuit High Bank 1
  • P2078 Mercury Intake Manifold Tuning Valve Position Sensor/Switch Circuit High Bank 1

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Code P2078 comments

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