P077C 2014 Chevrolet Silverado Code - Transmission Output Speed Sensor Circuit Low Voltage
Quick Answer
The Output Speed Sensor (OSS) is a hall-effect type sensor. Common causes include Faulty Transmission Output Speed Sensor (OSS), Transmission Output Speed Sensor harness is open or shorted, Transmission Output Speed Sensor circuit poor electrical connection. 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 2014 Chevrolet Silverado indicates Transmission Output Speed Sensor Circuit Low Voltage.
- Common causes
- Common causes include Faulty Transmission Output Speed Sensor (OSS), Transmission Output Speed Sensor harness is open or shorted, Transmission Output Speed Sensor circuit poor electrical connection.
- 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.
Code P077C 2014 Chevrolet Silverado Description
The Diagnostic Trouble Code (DTC) will be set when the TCM detects the vehicle speed sensor signal circuit voltage is less than 0.25 V for 0.8 s.
What are the Possible Causes of the DTC P077C 2014 Chevrolet Silverado?
- Faulty Transmission Output Speed Sensor (OSS)
- Transmission Output Speed Sensor harness is open or shorted
- Transmission Output Speed Sensor circuit poor electrical connection
- Faulty Transmission Control Module (TCM)
How to Fix the DTC P077C 2014 Chevrolet Silverado?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P077C 2014 Chevrolet Silverado code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P077C 2014 Chevrolet Silverado code?
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Frequently Asked Questions about P077C 2014 Chevrolet Silverado Code
What does the OBDII code P077C mean for a 2014 Chevrolet Silverado?
The P077C code indicates a Transmission Output Speed Sensor Circuit Low Voltage, meaning there’s an issue with the signal from the output speed sensor to the transmission control module.
What are the symptoms of the P077C code in a 2014 Chevrolet Silverado?
Common symptoms include erratic shifting, the transmission stuck in one gear, poor acceleration, reduced fuel efficiency, and the check engine light being illuminated.
What causes the P077C code in a 2014 Chevrolet Silverado?
Potential causes include a faulty output speed sensor, damaged wiring or connectors, a malfunctioning transmission control module (TCM), or low transmission fluid.
Can I drive my 2014 Chevrolet Silverado with the P077C code?
Driving with the P077C code is not recommended, as it may cause further damage to the transmission and result in unsafe driving conditions due to erratic shifting.
How do I fix the P077C code on a 2014 Chevrolet Silverado?
Repairs may include replacing the output speed sensor, repairing or replacing damaged wiring or connectors, reprogramming or replacing the TCM, and ensuring proper transmission fluid levels.
How can I diagnose the P077C code on my 2014 Chevrolet Silverado?
Diagnosis involves scanning the vehicle with an OBDII scanner, inspecting the output speed sensor and its wiring for damage, checking the TCM for faults, and testing the sensor’s voltage and resistance.
Is the output speed sensor expensive to replace on a 2014 Chevrolet Silverado?
The cost of replacing the output speed sensor varies but typically ranges from $100 to $300, depending on parts and labor costs in your area.
Can low transmission fluid cause the P077C code in a 2014 Chevrolet Silverado?
Yes, insufficient or contaminated transmission fluid can cause sensor malfunctions, leading to the P077C code. Always check and maintain proper fluid levels.
What tools are needed to repair the P077C code on a 2014 Chevrolet Silverado?
You’ll need an OBDII scanner, a multimeter for electrical testing, basic hand tools, and possibly a service manual specific to the vehicle.
Will clearing the P077C code fix the issue on a 2014 Chevrolet Silverado?
Clearing the code may temporarily turn off the check engine light, but the underlying issue must be fixed to prevent the code from returning.
Discuss the causes and fixes for P077C 2014 Chevrolet Silverado OBDII Code
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