P1443 Floor Temp Switch Circuit Malfunction
The P1443 code indicates a fault in the floor temperature switch circuit, which monitors the vehicle's floor temperature. This is typically associated with the EVAP system or internal environmental monitoring in Ford vehicles. The PCM has detected an electrical signal outside the expected parameters from the floor temperature switch/sensor, suggesting an open circuit, short circuit, or abnormal resistance.
01. Most Common Causes
- Faulty or damaged floor temperature switch
- Corroded, damaged, or disconnected wiring or connector in the sensor circuit
- Short to ground or voltage in the sensor wiring
- Excessive resistance in circuit connections
- PCM failure (less common)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Possible EVAP system issues or incorrect floor temperature readings
03. Step-by-Step Diagnosis
Scan for codes and verify P1443 is present
Inspect the floor temperature switch and its wiring for damage, corrosion, or loose connections
Test the switch resistance and compare to manufacturer specifications
Check for shorts or opens in the circuit using a multimeter
If all else is good, test the PCM or reprogram if necessary
1. Frequently Asked Questions
Is it safe to drive?▼
Yes, it is generally safe to drive with this code, but it may affect EVAP system performance or cause incorrect floor temperature readings. It's best to diagnose and repair soon to avoid further issues.
How much does it cost to fix?▼
Repair costs typically range from $100 to $300, depending on the cause. Replacing the switch or repairing wiring is usually affordable, but PCM replacement can be more expensive.