2008 Dodge Avenger: OBD Code P0073?

OBD Scan Test Showed Error Code P0073.

If you dont have Scan tool then also you can retrieve the codes manually.
There is a simple procedure.

Here it is:------

Get in the vehicle, and close all the doors.Now  Cycle the ignition to  ON-OFF-ON-OFF-ON within 5 seconds. Where the odometer is, should now be displayed p-codes. The Code starts with P and then 4 number will be shown one by one.
That is the error code.

Now As for OBD Error Code P0073, this p-code is fairly straight forward, and is pointing to a fault with the Ambient Temp Sensor (this is used for the heating/air conditioning systems).This Sensor is Located in front of right front tire.
This sensor has to be replaced.

If the sensor is replaced and still the Error code is not getting cleared, then  the next step is to carefully inspect the electrical connector and as far up the harness as you possibly can.
More than likely, there will be a broken or rubbed through wire somewhere.Which is noticed in many such cases. Make sure the wires are tight and not damaged at the electrical connector as well.
If  you see no issue with the wiring ,then other possibility is  that when the sensor was damaged, there was damage done to the Totally Integrated Power Module (TIPM) as this is the unit that controls this Ambient Temp Sensor.

Unfortunately, to test the TIPM will require the use of a scan tool and voltage meter.

See the diagram shown below for part location:---------




For Exact location of the TIPM module See the diagram shown below:-------



This details and diagrams will help.
Thanks.

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GMC Engine Coolant Temperature (ECT) Sensor Replacing?

Coolant Temperature Sensor monitors the temperature of the engine and sends that information to the engine control computer to regulate the amount of fuel needed. More fuel is needed if the engine is cold; less if it's hot. If the temperature is extreme, the signal will be sent to the temperature gauge as a visual indicator of overheating and imminent danger.

The sensor replacing details is as follows :---

OPERATION

The Engine Coolant Temperature (ECT) sensor is mounted in the intake manifold and sends engine temperature information to the VCM. The VCM supplies 5 volts to the coolant temperature sensor circuit. The sensor is a thermistor which changes internal resistance as temperature changes. When the sensor is cold (internal resistance high), the VCM monitors a high signal voltage which it interprets as a cold engine. As the sensor warms (internal resistance low), the VCM monitors a low signal voltage which it interprets as warm engine.

TESTING

See Figures 1, 2 and 3

1. Remove the ECT sensor from the vehicle.
2. Immerse the tip of the sensor in container of water.
3. Connect a digital ohmmeter to the two terminals of the sensor.
4. Using a calibrated thermometer, compare the resistance of the sensor to the temperature of the water. Refer to the engine coolant sensor temperature vs. resistance illustration.
5. Repeat the test at two other temperature points, heating or cooling the water as necessary.
6. If the sensor does not met specification shown in the temperature versus resistance chart, it must be replaced.
7. The sensor may also be checked in the vehicle. Unplug the sensor and attach a digital ohmmeter to the two terminals of the sensor.
8. Using a calibrated thermometer, compare the resistance of the sensor to the ambient air temperature.
9. Repeat the test at two other temperature points, heating or cooling the water as necessary.
10. If the sensor does not met specification shown in the temperature versus resistance chart, it must be replaced.

Fig. Fig. 1: Testing the Engine Coolant Temperature (ECT) sensor resistance

Fig. Fig. 2: Engine Coolant Temperature (ECT) sensor wiring diagram (wire color, terminal identification/location may vary on certain models)

Fig. Fig. 3: Engine Coolant Temperature (ECT) sensor temperature vs. resistance values

REMOVAL & INSTALLATION

See Figures 4 through 9

Fig. Fig. 4: Engine Coolant Temperature (ECT) sensor location-1994-95 4.3L TBI engines

Fig. Fig. 5: Engine Coolant Temperature (ECT) sensor location-1994-95 4.3L CMFI engines

Fig. Fig. 6: Engine Coolant Temperature (ECT) sensor location-1996- 1997 4.3L engines

Fig. Fig. 7: Engine Coolant Temperature (ECT) sensor location-1994-97 2.2L engines

Fig. Fig. 8: Engine Coolant Temperature (ECT) sensor location-1998-99 2.2L engines

Fig. Fig. 9: Engine Coolant Temperature (ECT) sensor location-1998-99 4.3L engines

1. Disconnect the negative battery cable.
2. Drain the cooling system below the level of the sensor and unplug the sensor electrical connection.
3. Remove the coolant sensor.

To install:

4. On 1998-99 models, coat the threads of the sensor with a suitable water resistant sealer such a sealer 9985253 or its equivalent.
5. Install the sensor and engage the electrical connector.
6. Refill the cooling system and connect the negative battery cable.

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This details will help you.Thanks.

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