P1436 1997 Ford F150 Code - A/C Evaporator Air 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
- P1436 1997 Ford F150 indicates A/C Evaporator Air 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.
Code P1436 1997 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 P1436 1997 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 P1436 1997 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 P1436 1997 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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Frequently Asked Questions about P1436 1997 Ford F150 Code
1. What does OBDII code P1436 mean on a 1997 Ford F150?
Code P1436 indicates a problem with the A/C evaporator air temperature sensor circuit, specifically a low voltage signal being detected.
2. What are the symptoms of code P1436 in a 1997 Ford F150?
Common symptoms include poor A/C performance, inconsistent cabin cooling, or the A/C system not functioning properly.
3. What causes the P1436 code to appear?
The code is typically caused by a faulty A/C evaporator air temperature sensor, damaged wiring or connectors, or a malfunctioning PCM.
4. Can I drive my 1997 Ford F150 with a P1436 code?
Yes, the vehicle is generally safe to drive, but the A/C may not work correctly, leading to discomfort in hot weather.
5. How do I diagnose the P1436 code?
Start by inspecting the A/C evaporator air temperature sensor, its wiring, and connectors for damage or corrosion. Use a multimeter to check for proper voltage and continuity.
6. How do I fix the P1436 code on my Ford F150?
Repairs may include replacing the A/C evaporator air temperature sensor, repairing or replacing damaged wiring, or updating/reprogramming the PCM if necessary.
7. Where is the A/C evaporator air temperature sensor located in a 1997 Ford F150?
The sensor is typically located near or within the A/C evaporator housing behind the dashboard.
8. How much does it cost to repair a P1436 code?
The repair cost can vary, ranging from $50 to $150 for a new sensor, plus labor charges if professional installation is required.
9. Can a bad PCM cause the P1436 code?
While rare, a malfunctioning PCM can cause the code if it fails to process the sensor’s signals properly.
10. Will clearing the P1436 code fix the issue?
Clearing the code may temporarily remove the warning, but if the underlying issue isn’t addressed, the code will likely return.
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