P0537 1998 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 1998 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.
Code P0537 1998 Ford F150 Description
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.
What are the Possible Causes of the DTC P0537 1998 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 1998 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 1998 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.
Need more information about the P0537 1998 Ford F150 code?
Need more information on how to fix the P0537 1998 Ford F150 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0537 1998 Ford F150 code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0537 1998 Ford F150 Code
What does the OBDII code P0537 mean on a 1998 Ford F150?
The code P0537 indicates that the A/C evaporator temperature sensor circuit is reporting a low input signal, suggesting an issue with the sensor or its wiring.
What are the symptoms of code P0537 in a 1998 Ford F150?
Symptoms may include reduced A/C performance, intermittent cooling, or the A/C system not functioning properly.
What causes the P0537 code to appear?
Common causes include a faulty A/C evaporator temperature sensor, damaged or corroded wiring, a poor electrical connection, or a malfunctioning A/C control module.
How do I diagnose the P0537 code on my 1998 Ford F150?
Start by inspecting the A/C evaporator temperature sensor and its wiring for damage or corrosion, then test the sensor’s resistance and ensure the circuit is receiving proper voltage.
Can I still drive my 1998 Ford F150 with the P0537 code active?
Yes, you can drive the truck, but the A/C system may not function correctly, leading to discomfort in hot weather.
How do I fix the P0537 code on a 1998 Ford F150?
Repairs may include replacing the A/C evaporator temperature sensor, repairing or replacing damaged wiring, or cleaning corroded electrical connections.
Is the A/C evaporator temperature sensor expensive to replace?
The sensor itself is typically affordable, but labor costs may vary depending on the complexity of accessing the evaporator unit.
Can a low refrigerant level cause the P0537 code?
No, this code specifically relates to the evaporator temperature sensor circuit and not refrigerant levels.
Do I need special tools to fix the P0537 code?
You may need a multimeter to test the sensor and wiring, and possibly A/C system tools if further diagnostics are required.
How do I prevent the P0537 code from recurring?
Regularly inspect the A/C system wiring, keep electrical connections clean, and address any A/C system issues promptly to avoid sensor or circuit problems.
Discuss the causes and fixes for P0537 1998 Ford F150 OBDII Code
Code P0537 1998 Ford F150 comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
