P0723 GMC 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 GMC 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.
Code P0723 GMC Description
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.
What are the Possible Causes of the DTC P0723 GMC?
- 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 GMC?
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 GMC 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 GMC code?
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Information for Specific GMC Models
- P0723 2014 GMC Sierra — Transmission Output Speed Sensor Circuit Intermittent
- P0723 2015 GMC Sierra — Transmission Output Speed Sensor Circuit Intermittent
- P0723 2016 GMC Sierra — Transmission Output Speed Sensor Circuit Intermittent
- P0723 2017 GMC Sierra — Transmission Output Speed Sensor Circuit Intermittent
- P0723 2018 GMC Sierra — Transmission Output Speed Sensor Circuit Intermittent
Frequently Asked Questions about P0723 GMC Code
1. What does the OBDII code P0723 mean for a GMC vehicle?
P0723 indicates an intermittent issue with the transmission output speed sensor circuit, which measures the rotational speed of the transmission’s output shaft.
2. What are the common symptoms of code P0723 in a GMC?
Symptoms may include erratic shifting, the transmission stuck in a single gear (limp mode), inaccurate speedometer readings, or the check engine light being illuminated.
3. What causes the P0723 code to appear on a GMC vehicle?
Common causes include a faulty output speed sensor, damaged wiring or connectors in the speed sensor circuit, a malfunctioning transmission control module (TCM), or debris interfering with the sensor.
4. Can I drive my GMC with a P0723 code?
Driving with this code is not recommended as it can result in poor transmission performance, potential damage to the transmission, and unsafe driving conditions.
5. How do I diagnose the P0723 code on my GMC?
Diagnosis involves checking the output speed sensor for damage, inspecting the wiring and connectors for corrosion or wear, and testing the sensor's signal with a multimeter or scan tool.
6. How do I fix the P0723 code on a GMC vehicle?
Repairs typically include replacing the faulty output speed sensor, repairing or replacing damaged wiring or connectors, and in rare cases, reprogramming or replacing the TCM.
7. How much does it cost to repair a P0723 code on a GMC?
Costs vary depending on the repair, ranging from $150-$300 for sensor replacement to higher costs if wiring or the TCM requires replacement.
8. Can a bad transmission output speed sensor trigger the P0723 code?
Yes, a defective speed sensor is one of the most common causes of this code, as it disrupts the signal needed for proper transmission operation.
9. Will clearing the code fix the P0723 issue on a GMC?
Clearing the code may temporarily remove the check engine light, but the underlying issue must be resolved to prevent the code from returning.
10. What tools are needed to troubleshoot the P0723 code on a GMC?
You’ll need an OBDII scanner, a multimeter for electrical testing, and potentially a repair manual or wiring diagram specific to your GMC model.
Discuss the causes and fixes for P0723 GMC OBDII Code
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