Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2016 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE
DTC P2004 TGV Control Stuck Open Bank 1: DTC Detecting Condition
- Immediately at fault recognition
- GENERAL DESCRIPTION < Ref. to DTC P2004 TGV CONTROL STUCK OPEN BANK 1 , Diagnostic Trouble Code (DTC) Detecting Criteria. >
CAUTION:
After servicing or replacing faulty parts, perform Clear Memory Mode < Ref. to
OPERATION
, Clear Memory Mode. >, and Inspection Mode < Ref. to
PROCEDURE
, Inspection Mode. >.
DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK FOR ANY OTHER DTC ON DISPLAY. | Is any other DTC displayed? | Check the appropriate DTC using the "List of Diagnostic Trouble Code (DTC)". < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . > | Go to step 2. |
2 CHECK TUMBLE GENERATOR VALVE RH.
|
Is there any dirt or clogging with foreign objects in the tumble generator valve? | Clean the tumble generator valve. | Replace the tumble generator valve RH. < Ref. to TUMBLE GENERATOR VALVE ASSEMBLY . > |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.