P00AC 2019 Ford F150 Code - Intake Air Temperature Sensor 1 Circuit Low Bank 2
Quick Answer
The Intake Air Temperature (IAT) Sensor is a thermistor device in which resistance changes with temperature. Common causes include Faulty Intake Air Temperature Bank 2 Sensor 1 (IAT21), Intake Air Temperature Bank 2 Sensor 1 harness is open or shorted, Intake Air Temperature Bank 2 Sensor 1 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
- P00AC 2019 Ford F150 indicates Intake Air Temperature Sensor 1 Circuit Low Bank 2.
- Common causes
- Common causes include Faulty Intake Air Temperature Bank 2 Sensor 1 (IAT21), Intake Air Temperature Bank 2 Sensor 1 harness is open or shorted, Intake Air Temperature Bank 2 Sensor 1 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 P00AC 2019 Ford F150 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. The voltage that is dropped across a fixed resistor in a 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 IAT sensor provides air temperature information to the PCM. The PCM uses the air temperature information as a correction factor in the calculation of fuel, spark, and airflow.
The IAT sensor provides a quicker temperature change response time than the Engine Coolant Temperature (ECT) or Cylinder Head Temperature (CHT) sensor.
Currently, there are 2 types of IAT sensors used, a stand-alone and an integrated type. Both types function the same, however, the integrated type is incorporated into the Mass Air Flow (MAF) Sensor, the Manifold Absolute Pressure and Temperature (MAPT) Sensor, or the Turbocharger Intake Pressure and Temperature (TCIPT) Sensor instead of being a stand-alone sensor.
The Intake Air Temperature 2 (IAT2) Sensor is typically located near the intake manifold and is used to measure the intake manifold temperature. The PCM uses this information to determine the air charge and provide input for various engine control functions. The IAT2 sensor may be integrated with the Manifold Absolute Pressure (MAP) Sensor.
This Diagnostic Trouble Code (DTC) is set when the Intake Air Temperature Bank 2, Sensor 1 (IAT21) sensor signal is less than the self-test minimum.
What are the Possible Causes of the DTC P00AC 2019 Ford F150?
- Faulty Intake Air Temperature Bank 2 Sensor 1 (IAT21)
- Intake Air Temperature Bank 2 Sensor 1 harness is open or shorted
- Intake Air Temperature Bank 2 Sensor 1 circuit poor electrical connection
How to Fix the DTC P00AC 2019 Ford F150?
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 P00AC 2019 Ford F150 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 P00AC 2019 Ford F150 Code
1. What does the OBDII code P00AC mean on a 2019 Ford F150?
The P00AC code indicates a "Intake Air Temperature Sensor 1 Circuit Low, Bank 2," meaning the sensor is reporting a voltage lower than expected to the engine control module (ECM).
2. What are the symptoms of code P00AC on a 2019 Ford F150?
Symptoms may include poor fuel efficiency, rough idling, reduced engine performance, difficulty starting, and possibly an illuminated check engine light.
3. What causes the P00AC code to appear on a 2019 Ford F150?
Common causes include a faulty intake air temperature (IAT) sensor, damaged or corroded wiring, a loose sensor connection, or an issue with the ECM.
4. Can I continue driving my 2019 Ford F150 with the P00AC code?
While the vehicle may still be drivable, ignoring this code can lead to reduced engine performance, potential long-term damage, and increased emissions.
5. How do I diagnose the P00AC code on my 2019 Ford F150?
Start by inspecting the IAT sensor and its wiring for damage or loose connections. Use a multimeter to test the sensor's resistance and confirm its voltage signals match specifications.
6. How do you fix the P00AC code on a 2019 Ford F150?
Repairs may include cleaning or replacing the IAT sensor, repairing or replacing damaged wiring, ensuring proper sensor connections, or, in rare cases, reprogramming or replacing the ECM.
7. Where is the Intake Air Temperature Sensor 1 located on a 2019 Ford F150?
The IAT sensor is typically integrated into the intake manifold or air intake tubing on Bank 2, which is the side of the engine opposite Cylinder 1.
8. How much does it cost to fix a P00AC code on a 2019 Ford F150?
Costs can range from $50 to $150 for a new sensor, plus labor if a mechanic performs the repair. Wiring repairs or ECM replacement may increase costs.
9. Can a dirty air filter cause the P00AC code on a 2019 Ford F150?
While unlikely, a severely clogged air filter can affect airflow and potentially lead to inaccurate IAT sensor readings, so it’s worth checking.
10. Will clearing the P00AC code fix the problem on a 2019 Ford F150?
Clearing the code may turn off the check engine light temporarily, but the underlying issue must be addressed to prevent the code from returning.
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