AutoCodes – Ford – P1436 1999 Ford F150

P1436 1999 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 1999 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.

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Code Popularity 1,794

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 29, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1436 1999 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 P1436 1999 Ford F150 - A/C Evaporator Air Temperature Circuit Low - AutoCodes.com — P1436 1999 Ford F150 Code - A/C Evaporator Air Temperature Circuit Low

What does this mean?

What are the Possible Causes of the DTC P1436 1999 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 1999 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 1999 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 P1436 1999 Ford F150 Code

1. What are the common symptoms of OBDII code P1436 in a 1999 Ford F150 related to the A/C Evaporator Air Temperature Circuit Low?

- Common symptoms include poor cooling performance from the air conditioning system, intermittent cold air, or the A/C compressor not engaging.

2. What could cause the A/C Evaporator Air Temperature Circuit Low OBDII code P1436 in a 1999 Ford F150?

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

3. How can I diagnose the A/C Evaporator Air Temperature Circuit Low issue in my 1999 Ford F150?

- Use an OBDII scanner to retrieve the specific code (P1436), check the wiring and connectors for damage, test the temperature sensor, and verify proper operation of the A/C system components.

4. What repairs might be needed to address the OBDII code P1436 related to the A/C Evaporator Air Temperature Circuit Low in a 1999 Ford F150?

- Repairs may involve replacing the faulty temperature sensor, repairing damaged wiring or connectors, resetting the A/C control module, or addressing any other underlying issues affecting the circuit.

5. Can driving with the A/C Evaporator Air Temperature Circuit Low OBDII code P1436 in a 1999 Ford F150 cause further damage?

- Continuing to drive with this issue may not only lead to discomfort due to inadequate cooling but could potentially strain the A/C system components if the root cause is not addressed promptly.

6. Is it safe to reset the OBDII code P1436 related to the A/C Evaporator Air Temperature Circuit Low in a 1999 Ford F150 without fixing the underlying problem?

- While clearing the code may temporarily turn off the check engine light, it is crucial to address the root cause to prevent potential A/C system malfunctions and ensure proper cooling performance.

7. How much can I expect to pay for repairs related to the A/C Evaporator Air Temperature Circuit Low OBDII code P1436 in a 1999 Ford F150?

- The cost of repairs can vary based on the specific issue, parts needed, and labor rates. It is advisable to consult a mechanic for a diagnosis and accurate estimate.

8. Are there any preventive maintenance tips to avoid encountering the A/C Evaporator Air Temperature Circuit Low issue in a 1999 Ford F150?

- Regularly servicing the A/C system, checking for loose or damaged wiring, and promptly addressing any cooling performance issues can help prevent the occurrence of this code.

9. Can I fix the A/C Evaporator Air Temperature Circuit Low problem related to OBDII code P1436 in a 1999 Ford F150 myself, or should I seek professional help?

- Depending on your automotive repair skills and access to tools, you may be able to address certain aspects of this issue yourself. However, complex electrical diagnostics and repairs may require professional assistance.

10. Will the OBDII code P1436 related to the A/C Evaporator Air Temperature Circuit Low in a 1999 Ford F150 affect the vehicle's overall performance?

- While this code is primarily related to the A/C system, unresolved issues could impact overall comfort and potentially lead to increased strain on the vehicle's cooling components.