Tumble Generator Valve 2 LH Stuck Closed
2016-2016 Subaru Forester 2.5L H4
The 2016 Subaru Forester is equipped with a 2.5L flat-4 engine. Below you'll find detailed p1093 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
The PCM has detected that the Tumble Generator Valve 2 on the left-hand bank is stuck in the closed position. The valve cannot open when commanded, restricting airflow at higher engine loads.
Symptoms
- Check Engine Light
- Reduced power at higher loads
- Restricted breathing on left bank
- Minor performance reduction
Common Causes
- Carbon or debris jamming LH TGV closed
- LH TGV actuator motor failure
- Seized LH TGV shaft
- Broken actuator linkage
- Wiring fault to actuator
Diagnostic Steps
- Command TGV 2 open and check response
- Inspect LH TGV for obstructions
- Test actuator motor operation
- Check shaft for seizure
- Inspect actuator wiring
Repair Notes
Clean the LH TGV or replace the actuator assembly if mechanically failed.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1093 on Other Vehicles
Common Questions
What does code P1093 mean on a 2016-2016 Subaru Forester?
P1093 stands for "Tumble Generator Valve 2 LH Stuck Closed". The PCM has detected that the Tumble Generator Valve 2 on the left-hand bank is stuck in the closed position. The valve cannot open when commanded, restricting airflow at higher engine loads.
What are the symptoms of P1093 on a Subaru Forester?
Common symptoms of P1093 include: Check Engine Light, Reduced power at higher loads, Restricted breathing on left bank, Minor performance reduction.
What causes P1093 on a 2016-2016 Subaru Forester?
Common causes of P1093 include: Carbon or debris jamming LH TGV closed, LH TGV actuator motor failure, Seized LH TGV shaft, Broken actuator linkage, Wiring fault to actuator.
Last updated: March 2026