P1087 Subaru Code - Tumble Generated Valve Position Circuit High 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
- P1087 Subaru indicates Tumble Generated Valve Position Circuit High 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 P1087 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 high voltage signal from the tumble generator valve position sensor.
What are the Possible Causes of the DTC P1087 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 P1087 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 P1087 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 P1087 Subaru Code
1. What are the common symptoms of OBDII code P1087 in a Subaru related to the Tumble Generated Valve Position Circuit High Sensor 2?
The common symptoms include rough idling, decreased engine performance, and the illumination of the check engine light.
2. What could be the possible causes of OBDII code P1087 in a Subaru?
Possible causes of this code include a faulty tumble generated valve position sensor, wiring issues, vacuum leaks, or a problem with the intake manifold.
3. How can I diagnose the issue causing OBDII code P1087 in my Subaru?
Diagnosing the issue involves using an OBDII scanner to read the code, checking the tumble generated valve position sensor's wiring and connections, inspecting the intake manifold, and testing for vacuum leaks.
4. Can I continue driving my Subaru with OBDII code P1087 present?
It is not recommended to drive your Subaru with this code present, as it can lead to further engine damage and decreased performance. It's best to address the issue promptly.
5. How can I repair OBDII code P1087 in my Subaru myself?
If you have the necessary tools and expertise, you can attempt to replace the faulty tumble generated valve position sensor, repair any damaged wiring, fix vacuum leaks, or clean the intake manifold yourself.
6. Will resetting the OBDII code P1087 in my Subaru make it go away permanently?
Resetting the code may temporarily turn off the check engine light, but if the underlying issue causing P1087 is not addressed, the code is likely to return.
7. Is it safe to ignore OBDII code P1087 in my Subaru?
Ignoring this code can lead to poor engine performance, reduced fuel efficiency, and potential damage to other components. It's best to address the issue promptly.
8. Can a faulty tumble generated valve position sensor cause other problems in my Subaru?
Yes, a faulty sensor can lead to issues such as misfires, decreased fuel efficiency, and overall poor engine performance.
9. How much does it typically cost to repair OBDII code P1087 in a Subaru at a professional mechanic?
The cost of repair can vary depending on the exact cause of the code, but it may range from $200 to $500 or more, including parts and labor.
10. How long does it usually take to repair OBDII code P1087 in a Subaru?
The repair time can vary based on the specific cause of the code and the expertise of the mechanic, but it typically takes a few hours to half a day to diagnose and fix the issue.
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