Circuit Description
WARNING: This page is about a different car, the 2003 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.
For circuit description, see CIRCUIT DESCRIPTION under DTC P0031, P0032, P0037, P0038, P0051, P0052, P0057 OR P0058. DTC P0130/P0150 is set when voltage output of heated oxygen sensor remains at 0.4 volts or more, or 0.55 volts or less. DTC P2195/2197 is set when voltage output of heated oxygen sensor remains at 0.55 volts or less during idle after engine is warmed up. DTC P2196/2198 is set when voltage output of heated oxygen sensor remains at 0.4 volts or more, during idle after engine is warmed up. Possible causes are:
- Open or short in heated oxygen sensor circuit.
- Defective heated oxygen sensor.
- Defective heated oxygen sensor heater.
- Leaking air intake system.
- Defective EFI relay.
- Fuel pressure problem.
- Faulty fuel injector.
- Faulty ECM.