How to test and replace the IAT sensor in a Ford Explorer?

If the following tests indicate that a sensor is good, and not the cause of a driveability problem or OTC, check the wiring harness and connectors between the sensor and the PCM for an open or short circuit. If no problems are found, have the vehicle checked by a dealer service department or other qualified repair shop. The Intake Manifold Temperature Sensor is a thermistor that changes resistance as temperature changes. The sensor is installed in the intake air duct to sense air temperature. As temperature increases, sensor resistance decreases and vice versa. The PCM uses this information to compute the intake temperature and fine tune fuel metering. A problem in the Intake Manifold Temperature Sensor circuit fault may be in the circuit wiring or connections or in the sensor itself. With the engine cool, disconnect the Intake Manifold Temperature Sensor and use an ohmmeter to measure sensor. For example, at 68-degrees F the ohms (Intake Manifold Temperature and Engine Coolant Temperature (ECT) sensors approximate temperature vs. resistance values). Next, start the engine and warm it up until it reaches operating temperature. Turn the engine off, disconnect the sensor and measure the resistance again. It should be lower. If the sensor resistance doesn't change as described, replace it. If the resistance values of the sensor are correct, check for reference voltage from the PCM to the sensor connector. The open-circuit voltage at the sensor connector should be approximately 5 volts. Disconnect the electrical connector, then carefully remove the Intake Manifold Temperature Sensor from the air intake duct. Be careful not to damage any of the plastic parts. Install and connect the new sensor.

Genuine Ford Explorer Intake Manifold Temperature Sensor

Air Intake Temperature Sensor

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Ford Explorer Sensor Assembly
Part Number: DS7Z-12A697-A
$12.64 MSRP: $19.64
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Product Specifications
- Other Name: Sensor Assy
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2016-2023 Ford Explorer | 4 Cyl 2.3 L GAS, 4 Cyl 2.3L TIVCT DI TC, 6 Cyl 3.0 L GAS | 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Automatic Transmission 6F50, 6-Speed Automatic Transmission 6F55, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Ford Explorer Sensor Assembly
Part Number: F57Z-12A697-A
$29.75 MSRP: $47.45
You Save: $17.70 (38%)
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Product Specifications
- Other Name: Sensor Assy
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1997-2001 Ford Explorer | 6 Cyl 4.0L, 8 Cyl 5.0L | 4AT 4R70W, 5AT 5R55E, 5MT
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Ford Explorer Sensor Assembly
Part Number: AA5Z-12A697-A
$14.02 MSRP: $22.36
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Product Specifications
- Other Name: Sensor Assy
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2013-2019 Ford Explorer | 6 Cyl 3.5L DOHC T/C | 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Automatic Transmission 6F50, 6-Speed Automatic Transmission 6F55, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Ford Explorer Sensor Assembly
Part Number: F4TZ-12A697-A
Product Specifications
- Other Name: Sensor Assy
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1995 Ford Explorer | 6 Cyl 4.0L | 4AT 4R44E, 4AT 4R55E, 4AT A4LD, 4AT AODE-E, 4AT AODE-W, 5MT

Ford Explorer Intake Manifold Temperature Sensor

The Intake Manifold Temperature Sensor is also important in Ford Explorer vehicles to regulate the temperature of the intake air in order to determine how well combustible the air is to give correct performance of the Explorer's engine. This information is sent to Powertrain Control Module (PCM), which alters the pulse of the fuel injector, in order to sustain the staked air to fuel mixture ratio during various operations. It is probable that there are several kinds of Intake Manifold Temperature Sensors that might have been fitted to different models of the Explorer; the sensors may differ in design or in calibration if the car has been tuned for improved performance. These sensors are designed to operate at particular air flow rates and fuel injectors; hence flexibility when performance parts are fitted. But higher values of air flow call for the use of new sensor to be able to read right and keep the performance of the engine efficient. In general, it is found that IAT sensor is very important to control the A/F ratio to drive the engine as well as to control the emission.

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Ford Explorer Intake Manifold Temperature Sensor Parts Questions & Experts Answers

Sensor Assembly
F4TZ-12A697-A
Q: How to test and replace the IAT sensor in a Ford Explorer?
A: If the following tests indicate that a sensor is good, and not the cause of a driveability problem or OTC, check the wiring harness and connectors between the sensor and the PCM for an open or short circuit. If no problems are found, have the vehicle checked by a dealer service department or other qualified repair shop. The Intake Manifold Temperature Sensor is a thermistor that changes resistance as temperature changes. The sensor is installed in the intake air duct to sense air temperature. As temperature increases, sensor resistance decreases and vice versa. The PCM uses this information to compute the intake temperature and fine tune fuel metering. A problem in the Intake Manifold Temperature Sensor circuit fault may be in the circuit wiring or connections or in the sensor itself. With the engine cool, disconnect the Intake Manifold Temperature Sensor and use an ohmmeter to measure sensor. For example, at 68-degrees F the ohms (Intake Manifold Temperature and Engine Coolant Temperature (ECT) sensors approximate temperature vs. resistance values). Next, start the engine and warm it up until it reaches operating temperature. Turn the engine off, disconnect the sensor and measure the resistance again. It should be lower. If the sensor resistance doesn't change as described, replace it. If the resistance values of the sensor are correct, check for reference voltage from the PCM to the sensor connector. The open-circuit voltage at the sensor connector should be approximately 5 volts. Disconnect the electrical connector, then carefully remove the Intake Manifold Temperature Sensor from the air intake duct. Be careful not to damage any of the plastic parts. Install and connect the new sensor.