AutoCodes – Ford – P0537 2007 Ford Fusion

P0537 2007 Ford Fusion Code - A/C Evaporator Temperature Circuit Low

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: P0537 2007 Ford Fusion indicates A/C Evaporator Temperature Circuit Low .
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 2,633

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 28, 2020

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P0537 2007 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 ACET signal input is less than Self-Test minimum. The Self-Test minimum is 0.13 volts.

OBDII Code P0537 2007 Ford Fusion - A/C Evaporator Temperature Circuit Low - AutoCodes.com — P0537 2007 Ford Fusion Code - A/C Evaporator Temperature Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0537 2007 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 P0537 2007 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 does this mean?

Code Tech Notes

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0537 2007 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 P0537 2007 Ford Fusion Code

1. What are the common symptoms of OBDII code P0537 in a 2007 Ford Fusion?

The common symptoms of code P0537 in a 2007 Ford Fusion include poor air conditioning performance, the A/C system not cooling properly, and the A/C compressor not engaging.

2. What does the OBDII code P0537 for a 2007 Ford Fusion indicate?

Code P0537 on a 2007 Ford Fusion indicates a fault in the A/C evaporator temperature circuit, specifically signaling that the evaporator temperature sensor reading is lower than normal.

3. What are the possible causes of OBDII code P0537 in a 2007 Ford Fusion?

Possible causes of code P0537 in a 2007 Ford Fusion include a faulty A/C evaporator temperature sensor, damaged wiring or connectors in the circuit, low refrigerant levels, or a malfunctioning A/C compressor.

4. How can I diagnose the A/C evaporator temperature circuit in a 2007 Ford Fusion with OBDII code P0537?

To diagnose the A/C evaporator temperature circuit in a 2007 Ford Fusion with code P0537, you can use a multimeter to test the sensor's resistance, check for wiring or connector issues, and inspect the A/C system components for any visible damage.

5. Can I still drive my 2007 Ford Fusion with OBDII code P0537?

While you may still be able to drive your 2007 Ford Fusion with code P0537, it is recommended to address the issue promptly to avoid potential damage to the A/C system and ensure proper cooling performance.

6. How can I repair OBDII code P0537 in my 2007 Ford Fusion?

Repairing code P0537 in a 2007 Ford Fusion involves replacing the faulty A/C evaporator temperature sensor, repairing any damaged wiring or connectors, checking and refilling refrigerant levels if necessary, and ensuring proper A/C system operation.

7. Is it safe to reset the OBDII code P0537 in a 2007 Ford Fusion without fixing the issue?

It is not recommended to simply reset code P0537 in a 2007 Ford Fusion without addressing the underlying problem, as the issue may persist and lead to further A/C system malfunctions or failures.

8. Will OBDII code P0537 affect the overall performance of my 2007 Ford Fusion?

Code P0537 may impact the overall performance of your 2007 Ford Fusion, particularly in terms of the A/C system's cooling efficiency and operation. Addressing the code promptly can help maintain optimal vehicle performance.

9. How much does it typically cost to repair OBDII code P0537 in a 2007 Ford Fusion?

The cost to repair code P0537 in a 2007 Ford Fusion can vary depending on the specific issue causing the code, the cost of parts and labor, and whether you choose to address the problem yourself or take it to a professional mechanic.

10. Can a DIY enthusiast fix OBDII code P0537 in a 2007 Ford Fusion?

A DIY enthusiast with the necessary tools and knowledge of automotive repairs may be able to fix code P0537 in a 2007 Ford Fusion, particularly if the issue involves replacing the A/C evaporator temperature sensor or addressing simple wiring problems.