P1086 Subaru Code - Tumble Generated Valve Position Circuit Low Sensor 2
Quick Answer
The tumble generator system uses an electronically controlled butterfly valve in each intake runner port. Common causes include Faulty Tumble Generator Position Sensor, Tumble Generator Position Sensor harness is open or shorted, Tumble Generator Position Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1086 Subaru indicates Tumble Generated Valve Position Circuit Low Sensor 2.
- Common causes
- Common causes include Faulty Tumble Generator Position Sensor, Tumble Generator Position Sensor harness is open or shorted, Tumble Generator Position Sensor circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1086 Subaru Description
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 tumble generator sensor is responsible for measuring the position of the tumble generator butterfly valves. As the butterfly valves are opened or closed, signal voltage will vary accordingly at the position sensor.
The Diagnostic Trouble Code (DTC) will set when the ECM detects a low voltage signal from the tumble generator valve position sensor.
What are the Possible Causes of the DTC P1086 Subaru?
- Faulty Tumble Generator Position Sensor
- Tumble Generator Position Sensor harness is open or shorted
- Tumble Generator Position Sensor circuit poor electrical connection
- Faulty Tumble Generator Valve
- Faulty Engine Control Module (ECM)
How to Fix the DTC P1086 Subaru?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1086 Subaru code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1086 Subaru Code
1. What are the common symptoms of OBDII code P1086 in a Subaru related to the Tumble Generated Valve Position Circuit Low Sensor 2?
- Common symptoms include poor engine performance, rough idling, decreased fuel efficiency, and potential stalling.
2. What are the possible causes of the OBDII code P1086 in a Subaru indicating an issue with Tumble Generated Valve Position Circuit Low Sensor 2?
- Possible causes include a faulty tumble generated valve position sensor, wiring issues in the sensor circuit, or a problem with the engine control module.
3. How can I diagnose the OBDII code P1086 related to Tumble Generated Valve Position Circuit Low Sensor 2 in my Subaru?
- Diagnosis typically involves using an OBDII scanner to read the code, checking the sensor's wiring and connections, and testing the sensor's functionality using a multimeter.
4. Is it safe to continue driving my Subaru with the OBDII code P1086 pointing to an issue with Tumble Generated Valve Position Circuit Low Sensor 2?
- It is not recommended to drive your vehicle with this code present, as it can lead to further engine damage and potential safety hazards.
5. How can the OBDII code P1086 related to Tumble Generated Valve Position Circuit Low Sensor 2 be repaired in a Subaru?
- Repair options may include replacing the faulty sensor, repairing any damaged wiring, or reprogramming the engine control module if necessary.
6. Can a DIY enthusiast fix the OBDII code P1086 indicating a problem with Tumble Generated Valve Position Circuit Low Sensor 2 in a Subaru?
- Depending on your skill level and access to tools, some DIY enthusiasts may be able to address this issue by following repair guides and being cautious with electrical components.
7. Are there any preventive maintenance tips to avoid encountering the OBDII code P1086 related to Tumble Generated Valve Position Circuit Low Sensor 2 in a Subaru?
- Regularly inspecting and maintaining your vehicle's sensors, as well as following the manufacturer's recommended service intervals, can help prevent issues leading to this code.
8. Can weather or environmental factors trigger the OBDII code P1086 in a Subaru associated with Tumble Generated Valve Position Circuit Low Sensor 2?
- Extreme temperatures, moisture, or debris can potentially affect the sensor's performance and contribute to triggering this code.
9. How long does it typically take to repair the OBDII code P1086 linked to Tumble Generated Valve Position Circuit Low Sensor 2 in a Subaru?
- Repair times can vary based on the exact cause of the issue and the complexity of the repair, but it may range from a few hours to a day in most cases.
10. Will resetting the OBDII code P1086 related to Tumble Generated Valve Position Circuit Low Sensor 2 in a Subaru make the problem go away permanently?
- Simply resetting the code without addressing the root cause will not permanently resolve the issue, as the problem will likely reoccur until the underlying problem is fixed.
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