AutoCodes – GMC – P0723 2014 GMC Sierra

P0723 2014 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 2014 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 233

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 2014 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 2014 GMC Sierra - Transmission Output Speed Sensor Circuit Intermittent - AutoCodes.com — P0723 2014 GMC Sierra Code - Transmission Output Speed Sensor Circuit Intermittent

What does this mean?

What are the Possible Causes of the DTC P0723 2014 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 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 P0723 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 P0723 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 P0723 2014 GMC Sierra Code

1. What does the OBDII code P0723 mean on a 2014 GMC Sierra?

P0723 indicates an intermittent issue in the transmission output speed sensor circuit, which can affect the vehicle's ability to properly monitor transmission operation.

2. What are common symptoms of code P0723 on a 2014 GMC Sierra?

Symptoms may include erratic transmission shifting, a loss of cruise control, poor acceleration, or the transmission going into "limp mode."

3. What causes the P0723 code to appear on a 2014 GMC Sierra?

Common causes include a faulty transmission output speed sensor, damaged wiring or connectors, electrical interference, or issues with the vehicle's transmission control module (TCM).

4. Can a faulty transmission output speed sensor trigger the P0723 code?

Yes, a malfunctioning or intermittently failing transmission output speed sensor is one of the primary reasons for this code.

5. How do I diagnose code P0723 on a 2014 GMC Sierra?

Start by inspecting the wiring and connectors related to the transmission output speed sensor for damage or corrosion. Then, test the sensor itself for proper operation using a multimeter.

6. Can driving with code P0723 damage my 2014 GMC Sierra?

Driving with this code can lead to erratic transmission behavior, which may strain the transmission and other components over time if not addressed.

7. How do I fix the P0723 code on a 2014 GMC Sierra?

Repairs typically involve replacing the transmission output speed sensor, repairing damaged wiring, cleaning corroded connectors, or addressing issues with the transmission control module.

8. Is replacing the transmission output speed sensor expensive?

The cost varies based on labor rates and part prices, but replacing the sensor is generally a moderate expense compared to major transmission repairs.

9. Can a transmission fluid issue cause the P0723 code?

Low or contaminated transmission fluid is not a direct cause but can exacerbate transmission issues, so fluid levels and condition should be checked during diagnosis.

10. Do I need professional help to fix the P0723 code on a 2014 GMC Sierra?

If you are experienced with vehicle diagnostics and repairs, you may be able to fix it yourself. Otherwise, consulting a professional mechanic is recommended for accurate diagnosis and repair.