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P1091 Subaru Code - Tumble Generated Valve System 1 Valve Close

- Code Popularity: 11,920 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P1091 Subaru?

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 Tumble Generator
  • Tumble Generator harness is open or shorted
  • Tumble Generator circuit poor electrical connection
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How to Fix the DTC P1091 Subaru?

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 P1091 Subaru 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 P1091 Subaru Description

The tumble generator system uses an electronically controlled butterfly valve in each intake runner port.
At cold idle, the tumble generator system will redirect the air charge through a different port. These ports have a finish characteristic that causes the air/fuel mixture to swirl and tumble greatly and create better combustion. This results in greater idle quality, cleaner emissions, and easier cold-starts.
Once the vehicle warms up, the tumble generator system will be deactivated and the intake air charge will be directed through the standard intake ports.
The Diagnostic Trouble Code (DTC) will set when the tumble generator valve is detected closed when the desired position is open.

OBDII Code P1091 Subaru - Tumble Generated Valve System 1 Valve Close - AutoCodes.com
P1091 Subaru Code - Tumble Generated Valve System 1 Valve Close

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