AutoCodes – Ford – P1437 1997 Ford F150

P1437 1997 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 1997 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 2,649

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 1997 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 1997 Ford F150 - A/C Evaporator Air Temperature Circuit High - AutoCodes.com — P1437 1997 Ford F150 Code - A/C Evaporator Air Temperature Circuit High

What does this mean?

What are the Possible Causes of the DTC P1437 1997 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 1997 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 1997 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 1997 Ford F150 Code

1. What are the common symptoms of OBDII code P1437 in a 1997 Ford F150 related to the A/C Evaporator Air Temperature Circuit High?

- Common symptoms may include reduced cooling performance from the A/C system, intermittent or no cold air, and possibly an illuminated check engine light.

2. What can cause the A/C Evaporator Air Temperature Circuit High error code P1437 in a 1997 Ford F150?

- Possible causes include a faulty A/C evaporator temperature sensor, damaged wiring or connectors in the circuit, or a malfunctioning HVAC control module.

3. How can I diagnose the A/C Evaporator Air Temperature Circuit High issue on my 1997 Ford F150?

- Diagnosis typically involves using an OBDII scanner to retrieve the fault code, checking the sensor and circuit for continuity and proper resistance values, and inspecting for any visible signs of damage.

4. Is it safe to continue driving my 1997 Ford F150 with OBDII code P1437 related to the A/C Evaporator Air Temperature Circuit High?

- While you may still be able to drive, it's recommended to address the issue promptly to avoid potential damage to the A/C system and ensure proper cooling function.

5. Can I reset the OBDII code P1437 in my 1997 Ford F150 related to the A/C Evaporator Air Temperature Circuit High?

- Resetting the code can be done with an OBDII scanner, but it's crucial to investigate and resolve the underlying cause to prevent the code from reappearing.

6. How much does it typically cost to repair the A/C Evaporator Air Temperature Circuit High issue causing OBDII code P1437 in a 1997 Ford F150?

- The cost can vary depending on the exact cause of the problem, but repairs might involve replacing the sensor, repairing wiring, or addressing issues with the HVAC control module.

7. Are there any DIY repair tips for fixing OBDII code P1437 related to the A/C Evaporator Air Temperature Circuit High in a 1997 Ford F150?

- DIY enthusiasts with automotive experience can attempt to inspect and replace the A/C evaporator temperature sensor or repair damaged wiring, but it's advisable to consult a professional if unsure.

8. Will fixing the A/C Evaporator Air Temperature Circuit High issue causing OBDII code P1437 improve my 1997 Ford F150's overall A/C performance?

- Yes, resolving the issue should restore proper functioning of the A/C system, leading to improved cooling performance and potentially better comfort while driving.

9. Can extreme weather conditions or external factors trigger the A/C Evaporator Air Temperature Circuit High error code P1437 in a 1997 Ford F150?

- While rare, extreme heat or cold might impact sensor readings and potentially trigger the code, so it's essential to consider environmental factors during diagnosis.

10. Is it necessary to visit a dealership or a specialized mechanic to address OBDII code P1437 related to the A/C Evaporator Air Temperature Circuit High in a 1997 Ford F150?

- While dealerships and specialized mechanics can provide expert assistance, many independent auto repair shops can also diagnose and repair the issue effectively, often at a lower cost.