When comparing OBD vs Fuel Sensors, relying on just one system creates monitoring gaps. OBD systems provide engine and driver behavior insights, while fuel sensors deliver accurate tank-level data and theft detection.
Fleet technology providers like Taabi emphasize using both systems together to improve efficiency, reduce fuel waste, and strengthen overall fleet control.
yes you need them both most newer vehicles have 2 upstream and 2 down stream sensors they are used to determine fuel consumption
Check the fuel-level sensor in the fuel pump. You may be getting a service engine soon light in the meantime. The error code is P0463. If all my guesses are correct you will need to replace both sensors.
In order to change either or both of the Knock Sensors, you must first remove the wire connections. The sensors are physically located directly underneath the intake plenum. You will need a metal tool to remove the fuel lines also. Needle nose pliers may be needed to extract them. You will need to use some sort of sealant on the new sensors.
Two lambda sensors are often used in vehicles to monitor the air-fuel mixture both before and after the catalytic converter. The upstream sensor measures the air-fuel ratio entering the engine, while the downstream sensor evaluates the efficiency of the catalytic converter by checking the exhaust gases. Having both sensors allows for better emissions control and fuel efficiency, as adjustments can be made based on real-time data from each sensor. Additionally, this setup helps identify potential issues with the engine or exhaust system.
There are 4 sensors on the manifoldcoming out of the engine. The highest two are the Air Fuel sensors. You can see them easily from above the engine. One is behind or in a heat shield. There are two more sensors that are lower. These sensors are the oxygen sensors. When ordering you need to know if the sensors are right hand or left hand, don't forget that is from the drivers seat not the way you face them from front of the car.
Need to know which engine it has.
I have no idea which specific sensors you are talking about. There are sensors all over the engine, in the exaust, on and inside the transmission, and even in the fuel tank. We need to know at least some form of the name of the sensor to figure out what you mean, and we need to know what year this vehicle is.
On newer fuel injected vehicles you will usually need a new wiring harness and engine computer to match the engine you are putting in. You will also need various sensors for the new engine such as mass airflow sensors and intake air temperature sensors.
you will need to remove the engine cover fuel rails and intake manifold unscrew the 2 knock sensors screw the new ones in and replace the manifold and fuel rails good to go...
Yes, but the fuel injectors and sensors will need swapped.
You need to buy a Haynes Repair manual. To replace the knock sensor, you need to remove the antifreeze from the engine. You need to disconnect the battery. You need to remove the alternator and the air box. ( You actually dont need to remove the alternator seeing as I did it with out taking the alternator off) You need to remove the fuel injection and the air intake manifold. Under the manifold there is a inspection plate that has two wires going into it. You will need to replace both sensors and both wiring harnesses that goes to the sensors. You will need a new intake manifold gasket and a torque wrench that is in INCH POUNDS - not foot pounds to torque the intake manifold. You will need to permetex the valley around the knock sensors to divert the water away from the knock sensors. Connect all the wires to the proper terminals and replace the anti freeze if it is more then 3 years old with a Universal antifreeze. Reconnect the battery wire and you should be good to go.
If you have not changed the Oxygen sensors I would do that. The O2 sensors ( which are a maintance item) need to be replaced when you have incorrect fuel delivery problems. Mark I had the same codes on my 96 Silverado and it was my fuel pump. Usually your 02 sensors will have a {no activity},{no response} or {heater circuit malfunction} when they are bad.