Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer thinks the sensor that checks how hot the transmission fluid is, is reading too high. It's like a thermometer that says it's really hot, even if it might not be.
The P2743 code is triggered when the transmission fluid temperature sensor B sends a voltage signal to the Powertrain Control Module (PCM) that is higher than the expected range.
Transmission Fluid Temperature Sensor B is responsible for monitoring the temperature of the transmission fluid. The PCM uses this information to adjust transmission operation for optimal performance and efficiency. A high circuit signal indicates that the sensor is reporting a temperature that is higher than normal operating parameters, which can be due to a malfunctioning sensor, wiring issues, or actual high transmission fluid temperature.
• Check Engine Light illuminated
• Transmission shifting issues
• Poor fuel economy
• Transmission overheating
• Faulty transmission fluid temperature sensor B
• Wiring issues such as shorts or open circuits
• High transmission fluid temperature
• Faulty PCM
PCM: Powertrain Control Module, the car's computer that controls engine and transmission functions.
Transmission Fluid: The fluid used to lubricate and cool the components of a vehicle's transmission.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors to the sensor for damage or corrosion.
• Test the transmission fluid temperature sensor with a multimeter.
• Check the actual transmission fluid temperature.
• Replace the transmission fluid temperature sensor B if faulty.
• Repair or replace damaged wiring or connectors.
• Flush and replace transmission fluid if necessary.
• Replace or reprogram the PCM if needed.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $400
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regular transmission fluid checks and changes.
• Routine inspection of wiring and sensors.
• Avoiding overheating the transmission by not towing over capacity.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional mechanic.
• Monitor transmission performance for any irregularities.
Check with the vehicle manufacturer for warranty coverage on transmission components.
P2743 has been a common issue in vehicles with electronic transmission controls, often due to sensor or wiring faults.
Moderate – Address the issue to prevent potential transmission damage.
Driving with this code may lead to further transmission damage, which can be costly to repair.
• Vehicle at operating temperature
• Transmission fluid at normal level
The transmission fluid temperature sensor is typically located inside the transmission or attached to the transmission housing.
Q: Can I drive with a P2743 code?
A: It's not recommended to drive for extended periods with this code, as it may indicate a transmission issue that could lead to further damage.
Q: How do I reset the P2743 code?
A: After fixing the issue, the code can be reset using an OBD-II scanner. However, if the problem persists, the code will return.
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