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Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems
Category: Chrysler
Satisfied Customers: 3970
Experience:  Owner at Carolina Auto Service & Sales , 20 years Experience in Foreign & Domestic Vehicles .
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I got a P0073 code when I had it checked because the engine

Customer Question

I got a P0073 code when I had it checked because the engine light came on and the climate control in the cabin stopped working. We replaced the ambient air temperature sensor, and the engine light is still on.
JA: Does the light stay on, or does it blink?
Customer: It stays on.
JA: What is the model/year of your Chrysler?
Customer: It's a Dodge actually.
JA: What year is your Chrysler?
Customer: 2012 Dodge Challenger
JA: Are you fixing your Challenger yourself? What have you tried so far?
Customer: Yes. We replaced the ambient air
JA: Anything else you want the mechanic to know before I connect you?
Customer: temperature sensor.
Submitted: 8 months ago.
Category: Chrysler
Expert:  Chad Farhat replied 8 months ago.

Hi, I'm Chad. Welcome to JustAnswer. I'm reviewing your question and I will be posting your reply ASAP.

Customer: replied 8 months ago.
Ok.
Expert:  Chad Farhat replied 8 months ago.

Hey how are you

Please read below the trouble shoot for this fault code DTC P0073 and click on link to view list of the most possible causes for this issue

P0073-AMBIENT AIR TEMPERATURE SENSOR CIRCUIT HIGH

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For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
With the ignition on. Battery voltage greater than 10.4 volts.

- Set Condition:
The Ambient Air Temperature (AAT) sensor input voltage is above the maximum acceptable value. One Trip Fault. Three good trips to turn off the MIL.

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Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See: Computers and Control Systems > Initial Inspection and Diagnostic Overview > Pre-Diagnostic Troubleshooting Procedure.

1. DTC IS ACTIVE

NOTE: Diagnose any CAN - C Communication DTCs before continuing.

NOTE: Diagnose and repair any system voltage DTCs before continuing with this test.

1. Start the engine and allow it to reach normal operating temperature.

WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hand near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in possible serious or fatal injury.

2. With the scan tool, select View DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 2

No

- Refer to CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. See: Computers and Control Systems > Initial Inspection and Diagnostic Overview > Intermittent Condition Test

2. AAT SENSOR
1. Turn the ignition off.
2. Disconnect the AAT Sensor harness connector.
3. Connect a jumper wire between the (G31) AAT Signal circuit and the (G931) AAT Return circuit in the AAT harness connector.
4. Turn the ignition on.
5. With a scan tool, read the AAT voltage.

Is the voltage below 1.0 volt with the jumper wire installed?

Please let me know if you received the links and you can view them

Thank You

Chad Farhat

ASE Certified Technician

Expert:  Chad Farhat replied 8 months ago.

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Thank You
Chad Farhat
ASE Certified Technician