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, isn't getting enough power or signal.
The transmission fluid temperature sensor monitors the temperature of the transmission fluid. A low circuit signal indicates an issue with the sensor's power or signal.
The P274C code is triggered when the Powertrain Control Module (PCM) detects a low voltage or signal from the transmission fluid temperature sensor C. This can be due to wiring issues, a faulty sensor, or problems with the PCM itself.
• Check Engine Light is on
• Transmission overheating
• Poor transmission performance
• Faulty transmission fluid temperature sensor
• Wiring issues or poor connections
• Faulty PCM
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors to the sensor.
• Test the sensor for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the transmission fluid temperature sensor.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly check and maintain transmission fluid levels.
• Inspect wiring and connectors periodically.
• Use quality transmission fluid.
Sensor Issue
• Avoid driving aggressively until the issue is fixed.
• Get the vehicle checked by a professional mechanic.
• Monitor transmission temperature if possible.
Check with the vehicle manufacturer for warranty coverage on sensors and related components.
This code has been reported in vehicles with high mileage or those with previous transmission issues.
Moderate – While the vehicle may still operate, ignoring this code can lead to transmission damage.
Driving with a faulty transmission sensor can lead to unsafe driving conditions and potential legal issues if the vehicle fails to meet emission standards.
• Engine running
• Transmission at operating temperature
The transmission fluid temperature sensor is typically located in the transmission oil pan or near the transmission cooler lines.
Q: Can I drive with a P274C code?
A: It's not recommended to drive for long periods with this code, as it can lead to transmission damage.
Q: How do I reset the Check Engine Light after fixing the issue?
A: Use an OBD-II scanner to clear the code after the repair. If the issue is resolved, the light should stay off.
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