P077C 2016 Chevrolet Silverado Code - Transmission Output Speed Sensor Circuit Low Voltage
Quick Answer
The P077C diagnostic trouble code (DTC) in a 2016 Chevrolet Silverado indicates a problem with the transmission output speed sensor circuit registering low voltage. Common causes include Faulty transmission output speed sensor, Wiring or connector issues in the sensor circuit, Corrosion or damage to sensor 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 2016 Chevrolet Silverado indicates Transmission Output Speed Sensor Circuit Low Voltage.
- Common causes
- Common causes include Faulty transmission output speed sensor, Wiring or connector issues in the sensor circuit, Corrosion or damage to sensor 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 2016 Chevrolet Silverado Description
The P077C diagnostic trouble code (DTC) in a 2016 Chevrolet Silverado indicates a problem with the transmission output speed sensor circuit registering low voltage. The transmission output speed sensor plays a crucial role in monitoring the speed of the output shaft of the transmission. This information is essential for the transmission control module (TCM) to determine the appropriate shift points and ensure smooth operation of the transmission.
Common Causes of P077C 2016 Chevrolet Silverado
- Faulty transmission output speed sensor
- Wiring or connector issues in the sensor circuit
- Corrosion or damage to sensor connections
- Issues with the TCM
- Electrical problems such as a blown fuse or short circuit
Symptoms of P077C 2016 Chevrolet Silverado
- Harsh or delayed shifting
- Transmission slipping
- Erratic speedometer readings
- Illumination of the Check Engine Light
- Reduced fuel efficiency
How to Fix P077C 2016 Chevrolet Silverado
- Begin by diagnosing the specific cause of the low voltage in the transmission output speed sensor circuit using a scan tool to retrieve the DTC.
- Inspect the sensor, wiring, and connectors for any visible damage, corrosion, or loose connections. Repair or replace any faulty components.
- Test the sensor's output voltage using a multimeter to ensure it is within the manufacturer's specified range.
- Clear the DTC from the vehicle's memory using the scan tool and test drive the vehicle to verify that the issue has been resolved.
- If the problem persists, further diagnostics may be necessary to identify any underlying issues with the TCM or other related components.
Cost to Fix P077C 2016 Chevrolet Silverado
The typical repair costs for addressing a P077C code in a 2016 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, replacing a faulty transmission output speed sensor or repairing wiring/connectors may cost between $150 to $300 for parts and labor. However, if additional diagnostics or repairs are needed, the total cost could increase. It's recommended to consult with a qualified mechanic or auto repair shop to obtain an accurate estimate based on the individual circumstances of the vehicle. Keep in mind that labor rates and part prices can vary based on location, vehicle make and model, and other factors.
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