P1437 2012 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 2012 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 2012 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 2012 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 2012 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 2012 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 2012 Ford Fusion Code
1. What does the OBDII code P1437 mean on a 2012 Ford Fusion?
P1437 indicates a high voltage reading in the A/C evaporator air temperature circuit, suggesting an issue with the sensor or its wiring.
2. What are the common symptoms of the P1437 code in a 2012 Ford Fusion?
Symptoms may include inconsistent cabin cooling, the A/C system shutting off unexpectedly, or the check engine light being illuminated.
3. What causes the P1437 code to appear?
Common causes include a faulty A/C evaporator temperature sensor, damaged sensor wiring, a poor connection, or a malfunctioning A/C control module.
4. Can I drive my 2012 Ford Fusion with the P1437 code?
Yes, but it is not recommended as the A/C system may not function correctly, potentially leading to discomfort or further damage.
5. How do I diagnose the P1437 code in my Ford Fusion?
Use a scan tool to confirm the P1437 code, inspect the A/C evaporator temperature sensor, check for damaged or corroded wiring, and test the sensor’s voltage readings.
6. How can I fix the P1437 code on a 2012 Ford Fusion?
Repairs may include replacing the A/C evaporator temperature sensor, repairing or replacing damaged wiring, or reprogramming the A/C control module if necessary.
7. How much does it cost to fix the P1437 code in a Ford Fusion?
The repair cost depends on the issue, but sensor replacement typically ranges from $100 to $200, including parts and labor.
8. Can a faulty A/C evaporator temperature sensor cause the P1437 code?
Yes, a malfunctioning sensor is a common cause of the P1437 code due to improper voltage readings.
9. How can I prevent the P1437 code from appearing again?
Regularly inspect and maintain the A/C system, check wiring for damage, and ensure proper sensor function during routine vehicle servicing.
10. Will clearing the P1437 code fix the issue permanently?
No, clearing the code will only reset the check engine light temporarily. The underlying issue must be addressed to prevent the code from returning.
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