AutoCodes – Ford – P1437 1998 Ford F150

P1437 1998 Ford F150 Code - A/C Evaporator Air Temperature Circuit High

Quick Answer

The A/C Evaporator Temperature (ACET) sensor contains a thermistor which receives a reference voltage from the Powertrain Control Module (PCM). Common causes include Faulty A/C Evaporator Temperature (ACET) Sensor, A/C Evaporator Temperature Sensor harness is open or shorted, A/C Evaporator Temperature Sensor circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: P1437 1998 Ford F150 indicates A/C Evaporator Air Temperature Circuit High.
Common causes: Common causes include Faulty A/C Evaporator Temperature (ACET) Sensor, A/C Evaporator Temperature Sensor harness is open or shorted, A/C Evaporator Temperature Sensor circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 1,673

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 29, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1437 1998 Ford F150 Description

The A/C Evaporator Temperature (ACET) sensor contains a thermistor which receives a reference voltage from the Powertrain Control Module (PCM). The thermistor then varies the resistance to the reference voltage based on the evaporator discharge air temperature. The resulting voltage is returned to the PCM where it is interpreted as an evaporator discharge air temperature reading.
The PCM maintains evaporator core temperature and prevents icing of the evaporator core, by disengaging the A/C compressor clutch when the evaporator A/C Evaporator Temperature sensor reading falls below acceptable levels, and by engaging the A/C compressor clutch when the discharge air temperature rises above acceptable levels.
The A/C Evaporator Temperature sensor is located inside of the heater core and evaporator core housing in the air-stream leaving the evaporator core.
The Diagnostic Trouble Code (DTC) indicates the A/C Evaporator Temperature sensor signal input is greater than Self-Test minimum. Self-Test maximum is 4.5 volts.

OBDII Code P1437 1998 Ford F150 - A/C Evaporator Air Temperature Circuit High - AutoCodes.com — P1437 1998 Ford F150 Code - A/C Evaporator Air Temperature Circuit High

What does this mean?

What are the Possible Causes of the DTC P1437 1998 Ford F150?

Faulty A/C Evaporator Temperature (ACET) Sensor
A/C Evaporator Temperature Sensor harness is open or shorted
A/C Evaporator Temperature Sensor circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P1437 1998 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 P1437 1998 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1437 1998 Ford F150 Code

1. What are the common symptoms of OBDII code P1437 on a 1998 Ford F150 related to the A/C Evaporator Air Temperature Circuit High?

- Common symptoms include poor air conditioning performance, warm air coming from the vents, and the A/C system not cooling properly.

2. What can cause the A/C Evaporator Air Temperature Circuit High code P1437 on a 1998 Ford F150?

- Possible causes can include a faulty ambient air temperature sensor, a malfunctioning A/C evaporator temperature sensor, or wiring issues in the circuit.

3. How can I diagnose the A/C Evaporator Air Temperature Circuit High code P1437 on a 1998 Ford F150?

- Diagnosis typically involves using an OBDII scanner to read the code, checking the ambient air temperature sensor, testing the A/C evaporator temperature sensor, and inspecting the wiring for any damage or loose connections.

4. Are there any quick repair tips for fixing OBDII code P1437 on a 1998 Ford F150 related to the A/C Evaporator Air Temperature Circuit High?

- Quick repair tips may include checking and replacing the ambient air temperature sensor, testing and replacing the A/C evaporator temperature sensor, and ensuring all wiring connections are secure and free of corrosion.

5. Can I drive my 1998 Ford F150 with the A/C Evaporator Air Temperature Circuit High code P1437?

- It is not recommended to drive the vehicle for an extended period with this issue, as it can lead to further damage to the A/C system and affect overall driving comfort.

6. How much does it typically cost to repair OBDII code P1437 on a 1998 Ford F150 related to the A/C Evaporator Air Temperature Circuit High?

- Repair costs can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

7. Is it possible to reset the OBDII code P1437 on a 1998 Ford F150 related to the A/C Evaporator Air Temperature Circuit High without fixing the underlying issue?

- While you can clear the code using an OBDII scanner, it is not recommended to do so without addressing the root cause, as the problem will likely return.

8. How long does it take to repair OBDII code P1437 on a 1998 Ford F150 related to the A/C Evaporator Air Temperature Circuit High?

- The repair time can vary based on the specific cause of the issue, but it typically takes 1-2 hours for a professional mechanic to diagnose and fix the problem.

9. Are there any recalls or technical service bulletins related to OBDII code P1437 on a 1998 Ford F150 regarding the A/C Evaporator Air Temperature Circuit High?

- It's recommended to check with Ford or the National Highway Traffic Safety Administration (NHTSA) for any recalls or technical service bulletins related to this specific OBDII code on your vehicle.

10. Can a DIY enthusiast with basic automotive knowledge fix OBDII code P1437 on a 1998 Ford F150 related to the A/C Evaporator Air Temperature Circuit High?

- Depending on the cause of the issue, some DIY enthusiasts may be able to address it by following repair guides and using basic tools. However, if unsure, it's best to consult with a professional mechanic.