AutoCodes – Ford – P0537 2012 Ford Fusion

P0537 2012 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 2012 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 2,496

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 2012 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 2012 Ford Fusion - A/C Evaporator Temperature Circuit Low - AutoCodes.com — P0537 2012 Ford Fusion Code - A/C Evaporator Temperature Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0537 2012 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 2012 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 2012 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 2012 Ford Fusion Code

1. What are the common symptoms of OBDII code P0537 on a 2012 Ford Fusion related to the A/C Evaporator Temperature Circuit Low?

- Common symptoms include poor A/C cooling performance, intermittent or no A/C operation, and the A/C system not blowing cold air.

2. What are the possible causes of OBDII code P0537 on a 2012 Ford Fusion?

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

3. How can I diagnose the A/C Evaporator Temperature Circuit Low issue on my 2012 Ford Fusion?

- You can diagnose the issue by using an OBDII scanner to retrieve the trouble code, visually inspecting the wiring and connectors, testing the A/C evaporator temperature sensor, and checking the HVAC control module.

4. Can I continue driving my 2012 Ford Fusion with OBDII code P0537 related to the A/C Evaporator Temperature Circuit Low?

- It is not recommended to drive for an extended period with this issue, as it can lead to discomfort due to poor A/C performance and may cause further damage to the A/C system.

5. How can I repair OBDII code P0537 on my 2012 Ford Fusion?

- To repair the issue, you may need to replace the faulty A/C evaporator temperature sensor, repair or replace damaged wiring or connectors, or reprogram the HVAC control module as necessary.

6. Will resetting the OBDII code P0537 on my 2012 Ford Fusion fix the A/C Evaporator Temperature Circuit Low problem?

- Resetting the code may temporarily clear the warning light, but it will not fix the underlying issue causing the A/C Evaporator Temperature Circuit Low fault.

7. Is it possible to prevent OBDII code P0537 from occurring on my 2012 Ford Fusion in the future?

- Regular maintenance of the A/C system, including checking for refrigerant leaks, ensuring proper system pressures, and inspecting sensor connections, can help prevent the recurrence of this code.

8. Can a DIY enthusiast repair OBDII code P0537 on a 2012 Ford Fusion?

- Depending on your skill level and access to tools, you may be able to diagnose and repair simple issues causing OBDII code P0537, such as checking and replacing the A/C evaporator temperature sensor or repairing wiring connections.

9. Are there any safety precautions to consider when working on the A/C Evaporator Temperature Circuit Low issue on a 2012 Ford Fusion?

- Always disconnect the battery before working on any electrical components, wear appropriate safety gear, and consult the vehicle's service manual for specific safety precautions related to the A/C system.

10. How much can I expect to pay for professional repairs related to OBDII code P0537 on a 2012 Ford Fusion?

- The cost of professional repairs for OBDII code P0537 can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.