AutoCodesGMC – P07C0 2014 GMC Sierra

P07C0 2014 GMC Sierra Code - Transmission Input Speed Sensor Circuit High Voltage

Quick Answer

The Input Speed Sensor detects the primary pulley revolution speed and sends a signal to the Transmission. Common causes include Faulty Transmission Input Speed Sensor, Transmission Input Speed Sensor harness is open or shorted, Transmission Input 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
P07C0 2014 GMC Sierra indicates Transmission Input Speed Sensor Circuit High Voltage.
Common causes
Common causes include Faulty Transmission Input Speed Sensor, Transmission Input Speed Sensor harness is open or shorted, Transmission Input 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.
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Code Popularity 165
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 29, 2022
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Code P07C0 2014 GMC Sierra Description

The Input Speed Sensor detects the primary pulley revolution speed and sends a signal to the Transmission. The Input Speed Sensor (ISS), also known as the transmission turbine speed sensor, is a hall-effect type sensor. The ISS mounts to the control valve upper body assembly and connects to the control solenoid (w/body and Transmission Control Module (TCM)) valve assembly through a wire harness and connector. The sensor faces the 1-2-3-4 and 3-5-R clutch housing machined teeth surface. The sensor receives 8.3-9.3 volts on the Input/Output Speed Sensor (ISS/OSS) supply voltage circuit from the Transmission Control Module (TCM). As the 1-2-3-4 and 3-5-R clutch housing rotates, the sensor produces a signal frequency based on the machined surface of the 1-2-3-4 and 3-5-R clutch housing. This signal is transmitted through the ISS signal circuit to the control solenoid (w/body and TCM) valve assembly. The control solenoid (w/body and TCM) valve assembly uses the ISS signal to determine line pressure, transmission shift patterns, Torque Converter Clutch (TCC) slip speed, and gear ratio. The Diagnostic Trouble Code (DTC) will be set when the TCM detects the ISS signal circuit voltage is greater than 4.75 V for 0.8 s.
OBDII Code P07C0 2014 GMC Sierra - Transmission Input Speed Sensor Circuit High Voltage - AutoCodes.com
P07C0 2014 GMC Sierra Code - Transmission Input Speed Sensor Circuit High Voltage

What are the Possible Causes of the DTC P07C0 2014 GMC Sierra?

  • Faulty Transmission Input Speed Sensor
  • Transmission Input Speed Sensor harness is open or shorted
  • Transmission Input Speed Sensor circuit poor electrical connection
  • Faulty Control Solenoid Valve Assembly

How to Fix the DTC P07C0 2014 GMC Sierra?

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 P07C0 2014 GMC Sierra 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 P07C0 2014 GMC Sierra code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P07C0 2014 GMC Sierra Code

What does the OBDII code P07C0 mean for a 2014 GMC Sierra?

P07C0 indicates a "Transmission Input Speed Sensor Circuit High Voltage," meaning the input speed sensor is detecting an abnormally high voltage.

What are the common symptoms of code P07C0 on a 2014 GMC Sierra?

Symptoms may include erratic shifting, poor acceleration, transmission slipping, or the Check Engine Light illuminating.

What causes the P07C0 code in a 2014 GMC Sierra?

Common causes include a faulty transmission input speed sensor, damaged wiring or connectors, or issues with the vehicle’s PCM (Powertrain Control Module).

Can I drive my 2014 GMC Sierra with the P07C0 code?

Driving with this code can cause further damage to the transmission and lead to unsafe driving conditions. It’s best to address the issue promptly.

How do I diagnose the P07C0 code on a 2014 GMC Sierra?

Diagnosis often involves inspecting the transmission input speed sensor, checking the wiring and connectors for damage, and using a multimeter to test for voltage abnormalities.

How do I fix the P07C0 code on my 2014 GMC Sierra?

Repairs may include replacing the input speed sensor, repairing damaged wiring or connectors, or reprogramming or replacing the PCM if necessary.

How much does it cost to repair the P07C0 code on a 2014 GMC Sierra?

Repair costs vary, but replacing a speed sensor typically costs $100-$300, while wiring repairs or PCM replacement can be more expensive.

Can a dirty or contaminated transmission cause the P07C0 code?

While unlikely, transmission issues such as dirty fluid or internal damage can indirectly affect sensor function and should be inspected as part of the diagnosis.

Do I need special tools to fix the P07C0 code on a 2014 GMC Sierra?

Basic tools like a multimeter and OBDII scanner are often required, but advanced repairs may need specialized equipment.

Will clearing the code erase the problem permanently?

Clearing the code will temporarily turn off the Check Engine Light, but the underlying issue must be resolved for the code not to return.

Discuss the causes and fixes for P07C0 2014 GMC Sierra OBDII Code

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