P1436 2011 Ford Fusion 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 2011 Ford Fusion 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 2011 Ford Fusion Description
The PCM maintains evaporator core temperature and prevents icing of the evaporator core, by disengaging the A/C compressor clutch (non-hybrid) or decreasing the electric A/C compressor speed (hybrid) when the evaporator A/C Evaporator Temperature sensor reading falls below acceptable levels, and by engaging the A/C compressor clutch (non-hybrid) or increasing the electric A/C compressor speed (hybrid) 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 2011 Ford Fusion?
- 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 2011 Ford Fusion?
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 2011 Ford Fusion 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 2011 Ford Fusion Code
1. What does the OBDII code P1436 mean on a 2011 Ford Fusion?
P1436 indicates an issue with the A/C evaporator air temperature circuit, specifically a low voltage signal being detected.
2. What are common symptoms of code P1436 in a 2011 Ford Fusion?
Symptoms may include poor A/C performance, warm air blowing from vents, or the A/C system not functioning properly.
3. What causes the P1436 code to appear?
Common causes include a faulty A/C evaporator air temperature sensor, damaged wiring or connectors, or a problem with the HVAC control module.
4. How do I diagnose the P1436 code in my 2011 Ford Fusion?
Start by inspecting the A/C evaporator air temperature sensor, checking for damaged or corroded wiring and connectors, and testing the sensor’s voltage and resistance.
5. Can I drive my 2011 Ford Fusion with the P1436 code active?
Yes, you can drive the car, but the air conditioning system may not function correctly, leading to discomfort in hot weather.
6. How can I fix the P1436 code on a 2011 Ford Fusion?
Repairs may include replacing the A/C evaporator air temperature sensor, repairing or replacing damaged wiring, or reprogramming the HVAC control module if necessary.
7. Where is the A/C evaporator air temperature sensor located on a 2011 Ford Fusion?
The sensor is typically located near the evaporator core inside the HVAC system, which may require removing part of the dashboard to access.
8. How much does it cost to fix the P1436 code on a 2011 Ford Fusion?
Repair costs vary, but replacing the sensor can range from $150 to $300, including parts and labor, depending on location and labor rates.
9. Can a faulty A/C evaporator air temperature sensor cause other issues?
Yes, it can cause incorrect A/C performance, prevent the system from cooling effectively, or trigger additional HVAC-related codes.
10. Will clearing the P1436 code fix the problem permanently?
Clearing the code will reset the check engine light temporarily, but the underlying issue must be resolved to prevent the code from returning.
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