P077C 2017 Chevrolet Silverado Code - Transmission Output Speed Sensor Circuit Low Voltage
Quick Answer
The P077C diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado indicates a problem with the Transmission Output Speed Sensor Circuit, specifically a low voltage issue. Common causes include Faulty Transmission Output Speed Sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or poor connections in the sensor circuit. 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 2017 Chevrolet Silverado indicates Transmission Output Speed Sensor Circuit Low Voltage.
- Common causes
- Common causes include Faulty Transmission Output Speed Sensor, Damaged wiring or connectors in the sensor circuit, Corrosion or poor connections in the sensor circuit.
- 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 2017 Chevrolet Silverado Description
The P077C diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado indicates a problem with the Transmission Output Speed Sensor Circuit, specifically a low voltage issue. The Transmission Output Speed Sensor is a vital component that monitors the speed of the output shaft of the transmission. This information is crucial for the proper operation of the transmission, as it helps the vehicle's computer system determine the appropriate shift points and ensure smooth gear changes.
Common Causes of P077C 2017 Chevrolet Silverado
- Faulty Transmission Output Speed Sensor
- Damaged wiring or connectors in the sensor circuit
- Corrosion or poor connections in the sensor circuit
- Issues with the vehicle's computer system
- Low transmission fluid levels or contaminated fluid
Symptoms of P077C 2017 Chevrolet Silverado
- Erratic shifting or delayed gear changes
- Harsh or rough shifting
- Transmission slipping
- Illumination of the Check Engine Light
- Decreased fuel efficiency
How to Fix P077C 2017 Chevrolet Silverado
- Begin by diagnosing the specific cause of the low voltage issue by using a scan tool to retrieve the DTC and inspecting the output speed sensor and its circuit.
- Replace the faulty Transmission Output Speed Sensor if it is determined to be the cause of the problem.
- Inspect and repair any damaged wiring or connectors in the sensor circuit.
- Clear the DTC from the vehicle's computer system using a scan tool.
- Test drive the vehicle to ensure that the issue has been resolved and that the transmission is functioning properly.
Cost to Fix P077C 2017 Chevrolet Silverado
The typical repair costs for addressing a Transmission Output Speed Sensor Circuit Low Voltage issue can vary depending on the specific cause of the problem. In general, the cost of replacing the sensor itself ranges from $100 to $200, while labor costs can range from $100 to $200. Additional costs may be incurred if there are other underlying issues that need to be addressed. It is advisable to consult with a professional mechanic to get an accurate estimate based on the specific circumstances of your vehicle.
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