P1437 2011 Ford Fusion Code - A/C Evaporator Air Temperature Circuit High
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
- P1437 2011 Ford Fusion indicates A/C Evaporator Air Temperature Circuit High.
- 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 P1437 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 A/C Evaporator Temperature sensor signal input is greater than Self-Test minimum. Self-Test maximum is 4.5 volts.
What are the Possible Causes of the DTC P1437 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 P1437 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 P1437 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 P1437 2011 Ford Fusion Code
1. What does the OBDII code P1437 in a 2011 Ford Fusion mean?
P1437 indicates a high voltage condition in the A/C evaporator air temperature circuit, which monitors the temperature of air passing through the A/C evaporator.
2. What are the symptoms of code P1437 in a 2011 Ford Fusion?
Common symptoms include reduced A/C performance, inconsistent cabin cooling, or an illuminated check engine light.
3. What causes the P1437 code in a 2011 Ford Fusion?
Possible causes include a faulty evaporator temperature sensor, damaged wiring or connectors, or issues with the HVAC control module.
4. Can I drive my 2011 Ford Fusion with the P1437 code?
While the vehicle may still be drivable, the A/C system may not function properly, and ignoring the issue could lead to further damage.
5. How do I fix the P1437 code on my 2011 Ford Fusion?
Repairs may involve replacing the evaporator temperature sensor, repairing or replacing damaged wiring, or reprogramming the HVAC control module if necessary.
6. How can I diagnose the P1437 code in my 2011 Ford Fusion?
Use an OBDII scanner to confirm the code, visually inspect the wiring and connectors for damage, and test the evaporator temperature sensor with a multimeter.
7. How much does it cost to repair the P1437 code in a 2011 Ford Fusion?
The cost varies but typically ranges from $100 to $300, depending on whether the issue is with the sensor, wiring, or HVAC control module.
8. Can a faulty evaporator temperature sensor cause the P1437 code?
Yes, a malfunctioning sensor can send incorrect signals to the HVAC system, triggering the P1437 code.
9. Will clearing the P1437 code fix the problem?
Clearing the code may temporarily remove the check engine light, but the issue will likely return unless the underlying problem is resolved.
10. Could a blown fuse cause the P1437 code on a 2011 Ford Fusion?
While unlikely, a blown fuse in the A/C system could potentially interrupt proper sensor operation and contribute to the code.
Discuss the causes and fixes for P1437 2011 Ford Fusion OBDII Code
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