P1088
Tumble Generator Valve 1 RH Position Sensor Low
2000-2004 Subaru Outback 2.5L H4 🇩🇪
Low SeverityPowertrain
Description
The PCM has detected a low-voltage condition on the Tumble Generator Valve 1 right-hand position sensor circuit. This is the right bank counterpart to P1086.
Symptoms
- Check Engine Light
- Minor fuel economy reduction
- Slightly increased emissions
Common Causes
- Faulty TGV 1 RH position sensor
- Wiring short to ground
- Corroded connector
- Sensor damage from heat
Diagnostic Steps
- Check TGV 1 RH position sensor voltage on scan tool
- Inspect sensor connector
- Test wiring for shorts to ground
- Verify reference voltage
- Compare left and right bank TGV readings
Repair Notes
Replace the TGV position sensor if faulty; repair wiring if shorted.
Related Codes
P1089Tumble Generator Valve 1 RH Position Sensor HighP1090Tumble Generator Valve 1 RH Stuck OpenP1091Tumble Generator Valve 1 RH Stuck ClosedP1094Fuel Rail Pressure Sensor Signal Out of RangeP1094Fuel Rail Pressure Sensor Signal Out of RangeP1094Fuel Rail Pressure Sensor Signal Out of RangeP1094Fuel Rail Pressure Sensor Signal Out of RangeP1094Fuel Rail Pressure Sensor Signal Out of RangeP1094Fuel Rail Pressure Sensor Signal Out of RangeP1094Tumble Generator Valve Circuit 1 OpenP1094Fuel Rail Pressure Sensor Signal Out of RangeP1094Fuel Rail Pressure Sensor Signal Out of Range
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
P1088 on Other Vehicles
Common Questions
What does code P1088 mean on a 2000-2004 Subaru Outback?
P1088 stands for "Tumble Generator Valve 1 RH Position Sensor Low". The PCM has detected a low-voltage condition on the Tumble Generator Valve 1 right-hand position sensor circuit. This is the right bank counterpart to P1086.
What are the symptoms of P1088 on a Subaru Outback?
Common symptoms of P1088 include: Check Engine Light, Minor fuel economy reduction, Slightly increased emissions.
What causes P1088 on a 2000-2004 Subaru Outback?
Common causes of P1088 include: Faulty TGV 1 RH position sensor, Wiring short to ground, Corroded connector, Sensor damage from heat.