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 is having trouble understanding the temperature of the transmission fluid because the sensors aren't agreeing with each other.
The vehicle's transmission control module (TCM) is detecting inconsistent readings from multiple transmission fluid temperature sensors.
The P077E code indicates that the transmission control module has detected a correlation error between multiple transmission fluid temperature sensors. This means that the readings from these sensors do not match within the expected range, suggesting a possible fault in the sensors or their circuits.
• Check Engine Light illuminated
• Transmission overheating
• Erratic or harsh shifting
• Faulty transmission fluid temperature sensor
• Wiring issues or poor connections in the sensor circuit
• Malfunctioning transmission control module (TCM)
Transmission Control Module (TCM): An electronic device that manages the transmission's operation.
Transmission Fluid Temperature Sensor: A sensor that measures the temperature of the transmission fluid to ensure optimal operation.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the transmission fluid temperature sensors for proper operation.
• Replace faulty transmission fluid temperature sensor(s).
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the transmission control module if necessary.
• OBD-II scanner
• Digital multimeter
• Basic hand tools
$150 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly check and maintain transmission fluid levels.
• Inspect and clean sensor connectors periodically.
• Schedule routine transmission service.
Sensor Issue
• Avoid driving the vehicle until the issue is diagnosed and repaired.
• Regularly monitor transmission fluid levels and condition.
Check with the manufacturer for specific warranty coverage on transmission components.
This code has been associated with sensor correlation issues in vehicles with advanced transmission control systems.
Moderate – Address promptly to avoid potential transmission damage.
Driving with a malfunctioning transmission can lead to safety hazards and further vehicle damage.
• Vehicle at operating temperature
• Engine running
Transmission fluid temperature sensors are typically located in the transmission housing or oil pan.
Q: Can I drive with a P077E code?
A: It's not recommended to drive with this code as it can lead to transmission damage.
Q: How do I reset the P077E code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is fixed, it should not return.
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