AutoCodes – Ford – P0537 2002 Ford F150

P0537 2002 Ford F150 Code - A/C Evaporator Temperature Circuit Low Input

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 2002 Ford F150 indicates A/C Evaporator Temperature Circuit Low Input .
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 1,797

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
Cost to Diagnose
FAQs
Comments
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Code P0537 2002 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 ACET signal input is less than Self-Test minimum. The Self-Test minimum is 0.13 volts.

OBDII Code P0537 2002 Ford F150 - A/C Evaporator Temperature Circuit Low Input - AutoCodes.com — P0537 2002 Ford F150 Code - A/C Evaporator Temperature Circuit Low Input

What does this mean?

What are the Possible Causes of the DTC P0537 2002 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 P0537 2002 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 P0537 2002 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 P0537 2002 Ford F150 Code

1. What are common symptoms of OBDII code P0537 on a 2002 Ford F150 related to the A/C evaporator temperature circuit?

The common symptoms include poor cooling performance from the A/C system, intermittent or complete loss of cold air, and the A/C compressor not engaging.

2. What are the likely causes of OBDII code P0537 on a 2002 Ford F150?

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

3. How can I diagnose the A/C evaporator temperature circuit low input issue on my 2002 Ford F150?

To diagnose the problem, you can use a scan tool to read the OBDII code, test the A/C evaporator temperature sensor with a multimeter, inspect the wiring and connectors for damage, and check the A/C system's refrigerant level.

4. Can I continue driving my 2002 Ford F150 with OBDII code P0537 related to the A/C evaporator temperature circuit?

It is not recommended to continue driving with this issue, as it can lead to further damage to the A/C system and may result in discomfort while driving in hot weather.

5. How can I repair OBDII code P0537 on my 2002 Ford F150 myself?

Depending on the root cause, you may need to replace the A/C evaporator temperature sensor, repair or replace damaged wiring or connectors, refill the refrigerant, or reset the A/C control module. If unsure, it's best to consult a professional mechanic.

6. Is resetting the OBDII code P0537 on a 2002 Ford F150 enough to fix the A/C evaporator temperature circuit low input issue?

Resetting the code may temporarily clear the warning light, but it won't fix the underlying problem causing the low input issue. Proper diagnosis and repair are necessary to resolve the issue permanently.

7. Can a malfunctioning A/C evaporator temperature sensor cause other issues in my 2002 Ford F150 besides code P0537?

Yes, a faulty sensor can also affect the overall performance of the A/C system, leading to inconsistent cooling, increased fuel consumption, and potential damage to other A/C components.

8. How much does it typically cost to repair OBDII code P0537 on a 2002 Ford F150 at a mechanic or dealership?

Repair costs can vary depending on the exact cause of the issue and labor rates in your area. Expect to pay for diagnostic time, parts such as the sensor or wiring, and labor costs for the repair.

9. Will OBDII code P0537 on a 2002 Ford F150 cause the check engine light to come on?

Yes, code P0537 related to the A/C evaporator temperature circuit low input will trigger the check engine light to illuminate on the dashboard of your Ford F150.

10. How can I prevent OBDII code P0537 from recurring on my 2002 Ford F150 in the future?

Regular maintenance of your A/C system, including checking refrigerant levels, servicing sensors, and inspecting wiring, can help prevent the reoccurrence of code P0537 and ensure your A/C system runs smoothly.