P1093moderate severityPowertrain
Tumble Generator Valve 2 LH Stuck Closed
on 2014 Subaru BRZ 2.0L H4 · AWD
What this code means
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.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1