Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car is telling you that the sensor that checks how hot the transmission fluid is might be broken or not working right.
The transmission fluid temperature sensor C is sending a signal to the car's computer that is higher than expected, indicating a potential issue with the sensor or its circuit.
The P274D code is triggered when the powertrain control module (PCM) detects a voltage signal from the transmission fluid temperature sensor C that is higher than the manufacturer's specified range. This could indicate a problem with the sensor itself, the wiring, or the connections.
• Check Engine Light is on
• Transmission may overheat
• Poor transmission performance
• Faulty transmission fluid temperature sensor C
• Wiring issues such as shorts or open circuits
• Bad electrical connections
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connections for damage.
• Test the transmission fluid temperature sensor C for proper operation.
• Replace the faulty transmission fluid temperature sensor C.
• Repair or replace damaged wiring or connectors.
• Clear the code and test drive to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regular maintenance of transmission fluid levels.
• Routine inspection of wiring and connectors.
• Avoid overheating the transmission by not overloading the vehicle.
Sensor Issue
• Have a professional inspect the vehicle if you're not comfortable with DIY repairs.
• Monitor transmission performance and fluid levels regularly.
Check with your vehicle manufacturer for warranty coverage on sensors and related components.
This code is relatively common in vehicles with high mileage or those that frequently tow heavy loads.
Moderate – Addressing this issue promptly can prevent further transmission damage.
Driving with a faulty transmission sensor can lead to unsafe driving conditions and potential transmission damage.
• Vehicle at operating temperature
• Transmission in normal operating mode
The transmission fluid temperature sensor is typically located on or near the transmission housing.
Q: Can I drive with a P274D code?
A: It's not recommended to drive for extended periods with this code as it may lead to transmission damage.
Q: How do I reset the P274D code?
A: After repairs, use an OBD-II scanner to clear the code, then test drive to ensure it doesn't return.
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