P0072 Lincoln Code - Ambient Air Temperature Sensor Circuit 'A' Low
Quick Answer
The Ambient Air Temperature (AAT) Sensor is a thermistor device in which resistance changes with temperature. Common causes include Faulty Ambient Air Temperature (AAT) Sensor, Ambient Air Temperature Sensor harness is open or shorted, Ambient Air Temperature Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0072 Lincoln indicates Ambient Air Temperature Sensor Circuit 'A' Low.
- Common causes
- Common causes include Faulty Ambient Air Temperature (AAT) Sensor, Ambient Air Temperature Sensor harness is open or shorted, Ambient Air Temperature Sensor circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0072 Lincoln Description
Thermistor type sensors are considered passive sensors. A passive sensor is connected to a voltage divider network so that varying the resistance of the passive sensor causes a variation in total current flow. Voltage that is dropped across a fixed resistor in series with the sensor resistor determines the voltage signal at the PCM. This voltage signal is equal to the reference voltage minus the voltage drop across the fixed resistor.
The AAT sensor provides ambient air temperature information to the PCM for the temperature sensor correlation tests. The PCM also communicates the AAT sensor information to all other modules on the controller area network (CAN).
This Diagnostic Trouble Code (DTC) sets when the ambient air temperature (AAT) sensor signal is less than the self-test minimum.
What are the Possible Causes of the DTC P0072 Lincoln?
- Faulty Ambient Air Temperature (AAT) Sensor
- Ambient Air Temperature Sensor harness is open or shorted
- Ambient Air Temperature Sensor circuit poor electrical connection
How to Fix the DTC P0072 Lincoln?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0072 Lincoln code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0072 Lincoln Code
What does the OBDII code P0072 mean for a Lincoln vehicle?
P0072 indicates that the Ambient Air Temperature Sensor Circuit 'A' is reading abnormally low voltage, which suggests a fault in the sensor or its wiring.
What are the common symptoms of the P0072 code in a Lincoln?
Symptoms may include inaccurate outside temperature readings, reduced fuel efficiency, or issues with climate control functionality.
What causes the P0072 code to appear?
Common causes include a faulty ambient air temperature sensor, damaged or corroded wiring, poor electrical connections, or a malfunctioning ECM.
How do I diagnose the P0072 code on my Lincoln?
Start by visually inspecting the sensor and wiring for damage or corrosion, then use a multimeter to check the sensor's resistance and the circuit voltage.
Can I drive my Lincoln with the P0072 code present?
While it may be safe to drive, it can affect climate control and fuel efficiency. It’s best to address the issue promptly to avoid further complications.
How do I fix the P0072 code in my Lincoln?
Repairs may involve replacing the ambient air temperature sensor, repairing damaged wiring, cleaning corroded connectors, or reprogramming the ECM if needed.
Where is the ambient air temperature sensor located on a Lincoln?
The sensor is typically located near the front grille or bumper area, exposed to outside air for accurate temperature readings.
What tools do I need to repair the P0072 code?
You’ll need a multimeter to test electrical circuits, an OBDII scanner to clear the code, and basic tools to access and replace the sensor or repair wiring.
How much does it cost to fix the P0072 code on a Lincoln?
Repair costs vary but typically range from $50 to $200, depending on whether you replace the sensor or need professional wiring repairs.
Can a bad ambient air temperature sensor affect engine performance?
Yes, an inaccurate temperature reading can impact engine efficiency and fuel economy, as the ECM relies on accurate data for optimal operation.
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