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Engine-Codes – Ford – P1436 1999 Ford F150

P1436 1999 Ford F150 Code - A/C Evaporator Air Temperature Circuit Low

Quick Answer

The diagnostic trouble code P1436 for a 1999 Ford F150 indicates a problem with the A/C evaporator air temperature circuit being too low. Common causes include Faulty temperature sensor in the A/C evaporator, Damaged or corroded wiring in the air temperature circuit, Issues with the A/C evaporator itself, such as leaks or blockages. 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 temperature sensor in the A/C evaporator, Damaged or corroded wiring in the air temperature circuit, Issues with the A/C evaporator itself, such as leaks or blockages.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code P1436 1999 Ford F150 Description

The diagnostic trouble code P1436 for a 1999 Ford F150 indicates a problem with the A/C evaporator air temperature circuit being too low. The A/C evaporator is a key component of the vehicle's air conditioning system, responsible for cooling the air before it is circulated into the cabin. The air temperature circuit is designed to monitor and regulate the temperature of the air passing through the evaporator. When this circuit detects that the air temperature is too low, it triggers the P1436 code.

OBDII Code P1436 1999 Ford F150 - A/C Evaporator Air Temperature Circuit Low
P1436 1999 Ford F150 Code - A/C Evaporator Air Temperature Circuit Low

Common Causes of P1436 1999 Ford F150

  1. Faulty temperature sensor in the A/C evaporator.
  2. Damaged or corroded wiring in the air temperature circuit.
  3. Issues with the A/C evaporator itself, such as leaks or blockages.
  4. Electrical problems in the A/C system.
  5. Software or programming issues in the vehicle's onboard computer.

Symptoms of P1436 1999 Ford F150

  1. Reduced cooling efficiency from the air conditioning system.
  2. Inconsistent temperature output from the A/C vents.
  3. Unusual odors coming from the air conditioning system.
  4. A/C system may not engage or may cycle on and off frequently.
  5. Check engine light may illuminate on the dashboard.

How to Fix P1436 1999 Ford F150

  1. Begin by diagnosing the specific cause of the P1436 code using a diagnostic scanner to pinpoint the issue.
  2. Inspect the temperature sensor in the A/C evaporator and replace it if faulty.
  3. Check the wiring in the air temperature circuit for damage or corrosion, repairing or replacing as needed.
  4. Inspect the A/C evaporator for leaks or blockages, addressing any issues found.
  5. Clear the trouble code from the vehicle's computer system and test the A/C system to ensure proper function.

Cost to Fix P1436 1999 Ford F150

The cost of repairing the A/C evaporator air temperature circuit low issue can vary depending on the specific cause of the problem and the labor rates in your area. On average, you can expect to pay between $150 to $400 for parts and labor. Keep in mind that diagnostic time and labor rates at auto repair shops can vary, so it's recommended to get quotes from multiple shops to find the best price for your repair.

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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.

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