P1089low severityPowertrain
Tumble Generator Valve 1 RH Position Sensor High
on 1997 Subaru Impreza 2.2L H4 · AWD
What this code means
The PCM has detected a high-voltage condition on the Tumble Generator Valve 1 right-hand position sensor circuit, indicating a possible open circuit or short to reference voltage on the right bank.
Symptoms
- Check Engine Light
- Minor fuel economy decrease
- Slightly higher emissions output
Common causes
- Open circuit in TGV 1 RH sensor wiring
- Disconnected sensor
- Faulty sensor with high internal resistance
- Short to reference voltage
Diagnostic steps
- Monitor TGV 1 RH sensor voltage on scan tool
- Inspect connector for secure connection
- Test wiring for opens or shorts to voltage
- Verify ground circuit
- Test sensor resistance
Repair notes
Repair open wiring or replace the TGV position sensor.
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