Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the sensor that checks how hot the transmission fluid is. It's like a thermometer for the car's transmission, and it's not working right.
The P274A code is triggered when the powertrain control module (PCM) detects a malfunction in the circuit of the transmission fluid temperature sensor labeled 'C'.
The transmission fluid temperature sensor measures the temperature of the transmission fluid and sends this information to the PCM. The PCM uses this data to adjust shifting patterns and ensure optimal transmission performance. If the sensor or its circuit fails, the PCM cannot accurately determine the transmission fluid temperature, which may lead to improper transmission operation.
• Check Engine Light is on
• Transmission overheating
• Erratic or harsh shifting
• Faulty transmission fluid temperature sensor
• Damaged or corroded wiring or connectors
• Faulty PCM
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to confirm the code.
• Inspect the transmission fluid temperature sensor and its wiring for damage.
• Test the sensor's resistance and compare it to the manufacturer's specifications.
• Replace the faulty transmission fluid temperature sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly check and maintain transmission fluid levels.
• Inspect wiring and connectors for damage during routine maintenance.
• Replace transmission fluid and filter as recommended by the manufacturer.
Sensor Issue
• Avoid driving the vehicle until the issue is resolved to prevent further damage.
• Consult a professional mechanic for accurate diagnosis and repair.
Repairs may be covered under the vehicle's powertrain warranty. Check with the manufacturer or dealer.
This code has been reported in various models, often related to sensor failure or wiring issues.
Moderate – This issue should be addressed soon to avoid potential transmission damage.
Ignoring this code may lead to transmission damage, which can be costly to repair. Ensure repairs are performed by a qualified technician.
• Engine at operating temperature
• Vehicle in park or neutral
The transmission fluid temperature sensor is typically located within the transmission or near the transmission oil pan.
Q: Can I drive with a P274A code?
A: It's not recommended to drive 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 confirming that the issue is resolved.
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