AutoCodes – Ford – P1437 2010 Ford Fusion

P1437 2010 Ford Fusion 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 2010 Ford Fusion 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 1,766

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 2010 Ford Fusion 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 (non-hybrid) or decreasing the electric A/C compressor speed (hybrid) when the evaporator A/C Evaporator Temperature sensor reading falls below acceptable levels, and by engaging the A/C compressor clutch (non-hybrid) or increasing the electric A/C compressor speed (hybrid) 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 2010 Ford Fusion - A/C Evaporator Air Temperature Circuit High - AutoCodes.com — P1437 2010 Ford Fusion Code - A/C Evaporator Air Temperature Circuit High

What does this mean?

What are the Possible Causes of the DTC P1437 2010 Ford Fusion?

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 2010 Ford Fusion?

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 2010 Ford Fusion 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 2010 Ford Fusion Code

1. What are the common symptoms of OBDII code P1437 in a 2010 Ford Fusion related to the A/C Evaporator Air Temperature Circuit High?

- Common symptoms include poor air conditioning performance, warmer air blowing from vents, and the A/C system not cooling the cabin effectively.

2. What are the possible causes of OBDII code P1437 in a 2010 Ford Fusion indicating a high A/C Evaporator Air Temperature Circuit?

- Potential causes may include a faulty A/C evaporator temperature sensor, wiring issues, damaged electrical connectors, or problems with the A/C control module.

3. How can I diagnose OBDII code P1437 in a 2010 Ford Fusion associated with the A/C Evaporator Air Temperature Circuit High?

- Diagnosis typically involves using a diagnostic scanner to read the code, testing the A/C evaporator temperature sensor, inspecting wiring and connectors for damage, and checking the A/C system components.

4. What are the repair options for addressing OBDII code P1437 in a 2010 Ford Fusion related to the A/C Evaporator Air Temperature Circuit High?

- Repair options may include replacing the A/C evaporator temperature sensor, repairing or replacing damaged wiring or connectors, resetting the code, and testing the A/C system for proper operation.

5. Can OBDII code P1437 in a 2010 Ford Fusion causing a high A/C Evaporator Air Temperature Circuit be fixed without professional help?

- While some simple repairs like checking and cleaning connectors can be done DIY, diagnosing and fixing complex issues related to this code may require professional assistance from a qualified mechanic.

6. Are there any temporary fixes or workarounds for OBDII code P1437 in a 2010 Ford Fusion indicating a high A/C Evaporator Air Temperature Circuit?

- Temporary fixes like resetting the code or disconnecting and reconnecting the battery may provide a temporary solution, but it's important to address the root cause of the issue for a permanent fix.

7. How critical is it to address OBDII code P1437 in a 2010 Ford Fusion linked to the A/C Evaporator Air Temperature Circuit High?

- Ignoring this code may lead to poor A/C performance, discomfort while driving in hot weather, and potential damage to other A/C components. It is advisable to address the issue promptly.

8. Can weather conditions or external factors trigger OBDII code P1437 in a 2010 Ford Fusion concerning the A/C Evaporator Air Temperature Circuit High?

- While extreme heat or weather conditions can impact A/C performance, the code itself is usually triggered by internal issues like sensor malfunctions or wiring problems within the A/C system.

9. Will resetting the OBDII code P1437 in a 2010 Ford Fusion associated with the A/C Evaporator Air Temperature Circuit High resolve the issue permanently?

- Resetting the code may clear it temporarily, but if the underlying issue causing the high A/C evaporator air temperature circuit is not addressed, the code is likely to reappear.

10. How can I prevent OBDII code P1437 from recurring in a 2010 Ford Fusion due to the A/C Evaporator Air Temperature Circuit High in the future?

- Regular maintenance of the A/C system, checking for wiring integrity, and promptly addressing any A/C performance issues can help prevent the recurrence of this code.