P077C 2018 Chevrolet Silverado Code - Transmission Output Speed Sensor Circuit Low Voltage
Quick Answer
The P077C diagnostic trouble code (DTC) specifically indicates that there is a low voltage condition detected in the transmission output speed sensor circuit of a 2018 Chevrolet Silverado. Common causes include Faulty transmission output speed sensor, Damaged or corroded wiring in the sensor circuit, Loose or poor electrical connections. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P077C 2018 Chevrolet Silverado indicates Transmission Output Speed Sensor Circuit Low Voltage.
- Common causes
- Common causes include Faulty transmission output speed sensor, Damaged or corroded wiring in the sensor circuit, Loose or poor electrical connections.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P077C 2018 Chevrolet Silverado Description
The P077C diagnostic trouble code (DTC) specifically indicates that there is a low voltage condition detected in the transmission output speed sensor circuit of a 2018 Chevrolet Silverado. The transmission output speed sensor is a crucial component that monitors the speed of the output shaft of the transmission. This information is essential for the vehicle's onboard computer to determine the appropriate shift points for optimal performance and fuel efficiency.
Common Causes of P077C 2018 Chevrolet Silverado
- Faulty transmission output speed sensor
- Damaged or corroded wiring in the sensor circuit
- Loose or poor electrical connections
- Issues with the transmission control module
- Internal transmission problems
Symptoms of P077C 2018 Chevrolet Silverado
- Erratic shifting behavior
- Harsh or delayed shifting
- Transmission slipping
- Limp mode activation
- Illumination of the check engine light
How to Fix P077C 2018 Chevrolet Silverado
- Begin by diagnosing the specific cause of the low voltage condition in the transmission output speed sensor circuit using a scan tool to retrieve the DTC and perform electrical tests.
- Inspect the wiring harness and connectors for any damage, corrosion, or loose connections. Repair or replace as necessary.
- Test the transmission output speed sensor for proper operation and replace if faulty.
- Clear the DTC from the vehicle's computer memory and test drive the vehicle to ensure the issue has been resolved.
- If the problem persists, further diagnostic testing may be required to identify any underlying transmission issues that may be contributing to the low voltage condition.
Cost to Fix P077C 2018 Chevrolet Silverado
The typical repair costs for addressing a P077C code on a 2018 Chevrolet Silverado can vary depending on the specific cause of the issue. Generally, the cost of replacing a transmission output speed sensor can range from $100 to $200, including parts and labor. However, if additional repairs or diagnostic testing are needed, the total cost may increase. It's advisable to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on the specific circumstances of the vehicle. Keep in mind that labor rates can vary between different locations and types of repair facilities.
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