Do carburetors have oxygen sensors?
Carburetors have fixed fuel metering jets so the air/fuel ratio is predetermined by the size of the orifices or metering rods in the carb. One of the key components in an electronic feedback fuel control system was the oxygen (O2) sensor.
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 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.
How does the O2 sensor in a car work?
The O2 sensor in your vehicle monitors the exhaust gases coming out of the engine. It determines the amount of oxygen in the gases, which indicates how well the fuel is being burned. The O2 sensor then sends information to the electronic control unit, or ECU, the vehicle’s computer.
Where is the O 2 sensor on a 2000 Jeep Grand Cherokee?
When you locate the area of the short, the light may again flicker or go off. In the case I was called in on, the vehicle was a 2000 Jeep Grand Cherokee with the 4.0L engine. The vehicle’s O 2 sensor harness was pinched underneath the valve cover at the back of the cylinder head.
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.
Can a bad O2 sensor cause an illuminated check engine light?
Faulty O2 sensors are a common cause of illuminated Check Engine Lights. Still, because the light may indicate a variety of other problems, it is important to watch for bad O2 sensor symptoms. If you notice any, repairing the problem as quickly as possible is a good idea to prevent further trouble.
How many oxygen sensors does a Mercedes Benz have?
Once you scan your car, you will get a fault code that directs you to the faulty oxygen sensor, for instance, Bank 1 Sensor 2. Which sensor would that be? There are usually four oxygen sensors on your Mercedes-Benz.
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.