P077C Buick Code - Transmission Output Speed Sensor Circuit Low Voltage
Quick Answer
The P077C Buick code 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 circuit, Corrosion or debris in the sensor. 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 Buick indicates Transmission Output Speed Sensor Circuit Low Voltage.
- Common causes
- Common causes include Faulty transmission output speed sensor, Damaged wiring or connectors in the circuit, Corrosion or debris in the sensor.
- 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 Buick Description
The P077C Buick code indicates a problem with the Transmission Output Speed Sensor Circuit, specifically a low voltage issue. The Transmission Output Speed Sensor is responsible for monitoring the speed of the output shaft on the transmission. This information is crucial for the transmission to shift properly and for the vehicle to operate smoothly. When the sensor detects a low voltage signal, it means that there is a problem with the circuit that sends this information to the vehicle's computer. This can lead to issues with shifting, performance, and overall drivability of the vehicle.
Common Causes of P077C Buick
- Faulty transmission output speed sensor
- Damaged wiring or connectors in the circuit
- Corrosion or debris in the sensor
- Issues with the vehicle's computer or transmission control module
- Electrical problems in the transmission system
Symptoms of P077C Buick
- Delayed or harsh shifting
- Erratic speedometer readings
- Check Engine Light illuminated
- Reduced fuel efficiency
- Transmission slipping
How to Fix P077C Buick
- Diagnose the issue by using a scan tool to read the code and test the output speed sensor.
- Inspect the wiring and connectors for any damage or corrosion. Repair or replace as necessary.
- Replace the transmission output speed sensor if it is faulty or damaged.
- Clear the code from the vehicle's computer and test drive to ensure the issue is resolved.
- If the problem persists, further diagnostics may be needed to check for other underlying issues in the transmission system.
Cost to Fix P077C Buick
The cost of repairing a Transmission Output Speed Sensor Circuit Low Voltage issue can vary depending on the extent of the damage and the specific components that need to be replaced. On average, the cost of replacing a transmission output speed sensor ranges from $150 to $250, including parts and labor. Additional costs may apply if there are other underlying issues that need to be addressed. It is recommended to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on your vehicle's make and model. Keep in mind that labor rates can vary, with average rates ranging from $80 to $150 per hour.
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