The engine computer references the oxygen sensors to determine how much oxygen is in the exhaust contrasted to the amount of oxygen in the atmosphere. The sensor voltage is created by chemical reactions the the computer uses to determine the exactly amount of fuel to be injected right into the engine. Oxygen sensors have the right to fail together the mile pass, due to carbon buildup and malfunction of the internal parts from heat cycles.

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This article applies to the evade Ram third Generation (2002-2008).

The 3rd generation Dodge ram uses 4 oxygen sensors: 2 in former of the catalytic converters and two after. The ECU references the front two sensors because that fuel control. The behind oxygen sensors are supplied to screen the performance of the converters mostly for emissions purposes. The sensors are typically identified by the surname Sensor 1 bank 1 or Sensor 2 financial institution 2. These numbers exchange mail to i m sorry exhaust pipe the sensor is located on, and where the sensor is situated in relationship to the exhaust manifolds.

Oxygen sensors incorporate many devoted working components that produce the reaction to generate its very own voltage. Some factors you might be see an oxygen sensor associated code are excessive carbon buildup top top the sensor, damaged ceramic coatings or zirconium elements, and electrode failures. Shorts, opens, and also high-resistance in the circuits" wiring can likewise cause a non-functioning sensor or a sensor v erratic readings.


Materials Needed22mm box-end wrenchFloor jackJack stand (2)Block of lumber (optional)Penetrating fluidAnti-seizeScan tool (optional)

It"s recommended actual Mopar oxygen sensors are supplied for ideal results. The component numbers room 56041698AA for the upstream sensors and also 56041706AA because that the downstream. These part numbers apply to the 5.7 liter hem engine.

Step 1 – Raise and support former of the truck

First, set the parking brake. Utilizing your floor jack, raise each side that the truck and place jack was standing under the structure rails. A block of wood can be placed between the frame rails and jack was standing to minimization the opportunity of damage developing from the pointed locations of the stands.

Figure 1. Placing jack was standing on the frame rails.

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Step 2 – Disconnect electrical connectors indigenous oxygen sensors

Once you are under the vehicle, apply some penetrating fluid where the sensor meets the exhaust. The dirtier your truck is, the higher the opportunity your sensor might be seized top top the pipe.

Follow the wiring up from which ever before sensor you room replacing. You will find where the connectors meet. If friend can"t reach the connectors, girlfriend will need to remove the wiring from any type of clips or push pins that organize the wiring in place. Seize the connector and also lift up on the locking tab situated on the sensor side while pulling lock apart.

Figure 2. The places of the 4 oxygen sensors.
Figure 3. The red arrowhead points to the locking tab.

Step 3 – eliminate oxygen sensor(s)

If you room sure you will not be making use of the sensor again, girlfriend can cut the connector plug off and also slide a 22mm box-end wrench onto the sensor. Otherwise, girlfriend will require the appropriate oxygen sensor socket. It will take some force to break the sensor loose. Turn the sensor in a counterclockwise direction.

Figure 4. A closer picture of an oxygen sensor.

Step 4 – Install brand-new sensor(s)

The brand-new sensors may have actually a plastic lid over the subject that needs to be removed. If there is no anti-seize top top the threads, apply a small amount. Begin the oxygen sensor by hand, and then torque the sensor to 22 ft./lb. Make sure the wiring is routed correctly when the connectors room plugged together.

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Step 5 – finish the installation

Raise the truck earlier up and remove the jack stands. Making use of a scan tool, erase the device trouble codes. If you perform not have a scan tool, driving because that 10 to 20 miles might erase the code.