P1400moderate severityPowertrain
Sub-Throttle Position Sensor
on 2009 Lexus GX 470 4.7L V8 · 4WD
What this code means
The ECM detected a malfunction in the sub-throttle position sensor circuit.
Symptoms
- CEL
- Poor throttle response
- Reduced power
- Idle fluctuation
Common causes
- Faulty sub-TPS
- Damaged wiring
- Throttle body contamination
- Faulty ECM
Diagnostic steps
- Test sensor voltage
- Inspect connector
- Clean throttle body
- Compare to specs
Repair notes
Replace sub-throttle sensor or clean throttle body.
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