AutoCodes – GMC – P0723 2015 GMC Sierra

P0723 2015 GMC Sierra Code - Transmission Output Speed Sensor Circuit Intermittent

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: P0723 2015 GMC Sierra indicates Transmission Output Speed Sensor Circuit Intermittent.
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.

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Code Popularity 339

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
Comments
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Code P0723 2015 GMC Sierra Description

The Output Speed Sensor (OSS) is a hall-effect type sensor. The OSS mounts to the automatic transmission case assembly and connects to the control solenoid valve assembly through a 2-wire harness and connector. The sensor faces the park gear teeth. The sensor receives battery voltage on the OSS supply voltage circuit from the Transmission Control Module (TCM). As the output shaft rotates, the sensor produces a signal frequency based on the park gear teeth. This signal is transmitted through the OSS signal circuit to the TCM. The TCM uses the OSS signal to determine line pressure, transmission shift patterns, vehicle speed, and gear ratio.
The Diagnostic Trouble Code (DTC) will be set when the TCM detects the transmission output speed dropped is greater than 650 RPM for 1.5 s.

OBDII Code P0723 2015 GMC Sierra - Transmission Output Speed Sensor Circuit Intermittent - AutoCodes.com — P0723 2015 GMC Sierra Code - Transmission Output Speed Sensor Circuit Intermittent

What does this mean?

What are the Possible Causes of the DTC P0723 2015 GMC Sierra?

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 P0723 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 P0723 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 P0723 2015 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 P0723 2015 GMC Sierra Code

What does the OBDII code P0723 mean for a 2015 GMC Sierra?

P0723 indicates an intermittent issue in the Transmission Output Speed Sensor Circuit, which measures the rotational speed of the transmission output shaft.

What are common symptoms of P0723 in a 2015 GMC Sierra?

Symptoms may include erratic shifting, transmission slipping, reduced fuel efficiency, and the check engine light turning on.

What causes the P0723 code in a 2015 GMC Sierra?

Common causes include a faulty output speed sensor, wiring issues such as frayed or damaged wires, loose electrical connections, or a malfunctioning transmission control module (TCM).

How can I diagnose the P0723 code on my 2015 GMC Sierra?

Start by inspecting the output speed sensor and its wiring for damage or loose connections. Use a diagnostic scanner to monitor sensor readings and check for circuit continuity.

Can I drive my 2015 GMC Sierra with the P0723 code?

Driving with this code can cause transmission issues and potential damage. Itâ€™s best to address the problem as soon as possible to avoid further complications.

How do I fix the P0723 code on a 2015 GMC Sierra?

Repairs may include replacing the output speed sensor, repairing or replacing damaged wiring, cleaning electrical connectors, or reprogramming or replacing the transmission control module.

How much does it cost to fix the P0723 code on a 2015 GMC Sierra?

Costs vary depending on the issue, but replacing the output speed sensor typically costs $100â€“$300, while wiring or TCM repairs may be more expensive.

Can a dirty or corroded connector cause the P0723 code?

Yes, corrosion or debris on the sensorâ€™s connectors can disrupt the electrical signal and trigger the code.

What tools are needed to diagnose and repair the P0723 code?

Youâ€™ll need a diagnostic scanner, a multimeter to test electrical continuity, and basic tools to inspect and replace the sensor or wiring.

Is the P0723 code related to other transmission issues?

Yes, P0723 can lead to or be associated with other transmission codes, especially if the sensorâ€™s malfunction affects gear-shifting or speed calculations.