AutoCodes – Cadillac – P0723 Cadillac

P0723 Cadillac 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 Cadillac 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 1,456

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 Cadillac 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 Cadillac - Transmission Output Speed Sensor Circuit Intermittent - AutoCodes.com — P0723 Cadillac Code - Transmission Output Speed Sensor Circuit Intermittent

What does this mean?

What are the Possible Causes of the DTC P0723 Cadillac?

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 Cadillac?

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 Cadillac 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.

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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 Cadillac Code

1. What does the OBDII code P0723 mean for a Cadillac?

P0723 indicates an intermittent issue with the transmission output speed sensor circuit, which monitors the speed of the transmission output shaft.

2. What are the common symptoms of code P0723 in a Cadillac?

Symptoms may include erratic shifting, the transmission staying in one gear, the speedometer not working, reduced fuel efficiency, or the Check Engine Light illuminating.

3. What causes the P0723 code to appear on a Cadillac?

Common causes include a faulty transmission output speed sensor, damaged or corroded wiring, loose electrical connections, or a malfunctioning transmission control module (TCM).

4. Can I drive my Cadillac with a P0723 code?

Driving with a P0723 code is not recommended as it can lead to poor transmission performance, potential damage, and unsafe driving conditions.

5. How do I diagnose a P0723 code on my Cadillac?

Start by inspecting the output speed sensor and its wiring for damage or corrosion. Use a scan tool to monitor sensor data and perform continuity tests on the circuit if needed.

6. How do I fix the P0723 code on my Cadillac?

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

7. How much does it cost to repair a P0723 code on a Cadillac?

Repair costs vary but typically range from $100 to $300, depending on whether the issue is with the sensor, wiring, or a more complex TCM problem.

8. Can a dirty or low transmission fluid level cause a P0723 code?

While not a primary cause, dirty or low transmission fluid can affect sensor operation and should be checked as part of the diagnostic process.

9. Will resetting the Check Engine Light fix a P0723 code on a Cadillac?

Resetting the light may temporarily clear the code, but the underlying issue must be addressed to prevent it from returning.

10. Is the transmission output speed sensor hard to replace on a Cadillac?

Replacing the sensor is generally straightforward, though its location may vary by model. Consult your vehicle's service manual for specific instructions.