Where is the fuse on an oxygen sensor heater?
Look at the right bank of fuses in the fusebox. Count the 4th fuse from the top. It is a 10A fuse which supplies power to both oxygen sensor heaters. If in doubt, it is the fuse below the 15A one which is for the fuel pump.
How to diagnose O2 sensor heater circuit failure?
The modified test harness with the light will give you easy access to the circuit. Remember, the engine needs to be running at this point. If the voltage is close to zero on the positive heater wire, then locate the open circuit in the power wire back to the fuse. Again, it may have a relay in the circuit as well.
What should I do if my O2 sensor shorted out?
In that case, first check for a blown fuse. If the O 2 sensor’s heater had shorted out, the fuse may have blown as well. Once you determine that the fuse is okay, check for voltage at the O 2 sensor harness connection. The modified test harness with the light will give you easy access to the circuit.
How many amps do you need for O2 sensor heater?
If O2 heater stays On, look for about 2 Amps. If O2 heater flickers, look for between 0.5 or half an Amp to 2 Amps. Remember that the ECM will shut Off the O2 heater circuit in the event of a malfunction, so you may need to erase codes. That’s it for the O2 sensor heater Quick-Fix.
Where is heated O2 sensor fuse located?
The Heated Oxygen Sensors (HO2S) are located in the exhaust system. On some vehicles, one sensor is located up at the exhaust manifold(s) and the other sensor is located down at the catalytic converter.
Where is the Bank One O2 sensor?
Bank one is the engine cylinder bank near the engine firewall (see diagram). The bank one sensor one is the Oxygen sensor (O2) located in the exhaust pipe just of the engine cylinder bank at rear and before the Catalytic Converters .
Where is O2 sensor Bank 1 sensor 2 located?
The O2 sensors are located in the exhaust piping. One (bank 1) is on the engine side of the Catalytic convertor. Second (bank 2) is on the other side (exhaust end).
Where is the rear O2 sensor located?
The rear oxygen sensor is located in the front section of the rear catalytic converter. On the 2.2L engine the front (A/F) oxygen sensor is located in the front section of the front catalytic converter. The rear oxygen sensor is located in the rear section of the rear catalytic converter.