P077D 2017 Chevrolet Silverado Code - Transmission Output Speed Sensor Circuit High Voltage
Quick Answer
The P077D diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado indicates a problem with the transmission output speed sensor circuit registering high voltage. Common causes include Faulty transmission output speed sensor, Damaged or corroded wiring connecting the sensor to the vehicle's computer, Issues with the vehicle's computer or transmission control module. 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
- P077D 2017 Chevrolet Silverado indicates Transmission Output Speed Sensor Circuit High Voltage.
- Common causes
- Common causes include Faulty transmission output speed sensor, Damaged or corroded wiring connecting the sensor to the vehicle's computer, Issues with the vehicle's computer or transmission control module.
- 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 P077D 2017 Chevrolet Silverado Description
The P077D diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado indicates a problem with the transmission output speed sensor circuit registering high voltage. 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 vehicle's onboard computer to determine the proper shift points for optimal performance and fuel efficiency.
Common Causes of P077D 2017 Chevrolet Silverado
- Faulty transmission output speed sensor
- Damaged or corroded wiring connecting the sensor to the vehicle's computer
- Issues with the vehicle's computer or transmission control module
- Low transmission fluid levels or contaminated fluid
- Electrical issues such as a blown fuse or relay affecting the sensor circuit
Symptoms of P077D 2017 Chevrolet Silverado
- Erratic shifting patterns
- Harsh or delayed shifts
- Transmission slipping
- Transmission going into limp mode
- Illumination of the Check Engine Light
How to Fix P077D 2017 Chevrolet Silverado
- Begin by diagnosing the specific cause of the high voltage reading in the transmission output speed sensor circuit using a scan tool to retrieve the code and perform further testing.
- Inspect the wiring harness connecting the sensor to the vehicle's computer for any damage, corrosion, or loose connections. Repair or replace any faulty wiring as needed.
- Test the transmission output speed sensor itself to determine if it is functioning correctly. Replace the sensor if it is found to be faulty.
- Check the transmission fluid level and condition. Top off or replace the fluid if necessary.
- Clear the DTC from the vehicle's computer and test drive the vehicle to ensure that the issue has been resolved.
Cost to Fix P077D 2017 Chevrolet Silverado
The typical repair costs for addressing a P077D code on a 2017 Chevrolet Silverado can vary depending on the specific cause of the issue. Generally, the cost of replacing a transmission output speed sensor ranges from $100 to $300, including parts and labor. However, if the issue is related to wiring or the vehicle's computer, the cost may increase accordingly. Additionally, diagnostic time and labor rates at auto repair shops can vary, typically ranging between $80 and $150 per hour. It is advisable to check with local repair shops for a more accurate estimate based on your location and vehicle specifics.
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