AutoCodes – GMC – P07C0 2015 GMC Sierra

P07C0 2015 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 2015 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 156

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 29, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
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Code P07C0 2015 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 2015 GMC Sierra - Transmission Input Speed Sensor Circuit High Voltage - AutoCodes.com — P07C0 2015 GMC Sierra Code - Transmission Input Speed Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P07C0 2015 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 2015 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 2015 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 2015 GMC Sierra code?

Need more information on how to fix the P07C0 2015 GMC Sierra code? Get Access to Factory Service Manuals

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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 2015 GMC Sierra Code

What does the OBDII code P07C0 mean in a 2015 GMC Sierra?

The P07C0 code indicates a high voltage issue in the transmission input speed sensor circuit, suggesting a problem with the sensor or its related wiring.

What are the symptoms of code P07C0 in a 2015 GMC Sierra?

Common symptoms include erratic shifting, transmission slipping, poor acceleration, and the illumination of the Check Engine Light.

What causes the P07C0 code in a 2015 GMC Sierra?

Possible causes include a faulty transmission input speed sensor, damaged wiring or connectors, or issues with the powertrain control module (PCM).

Can I drive my 2015 GMC Sierra with the P07C0 code?

Driving with this code is not recommended as it can cause further damage to the transmission or lead to unsafe driving conditions.

How do I diagnose the P07C0 code in my 2015 GMC Sierra?

Start by inspecting the speed sensor wiring and connectors for damage. Use a multimeter to check for voltage irregularities and test the sensor for proper operation.

How do you fix the P07C0 code on a 2015 GMC Sierra?

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

What tools are needed to troubleshoot the P07C0 code?

Youâ€™ll need an OBDII scanner, a multimeter, and possibly wiring diagrams for your vehicle to help trace any electrical issues.

How much does it cost to fix the P07C0 code on a 2015 GMC Sierra?

Repair costs vary but typically range from $100 to $300 for parts and labor, depending on whether the sensor or wiring needs to be replaced.

Can a bad PCM cause the P07C0 code?

Yes, a malfunctioning PCM can send incorrect voltage signals, causing the P07C0 code to appear, though this is less common.

How can I prevent the P07C0 code from recurring in my 2015 GMC Sierra?

Regular maintenance, including inspecting wiring and connectors and addressing transmission issues promptly, can help prevent this code from reappearing.