AutoCodes – GMC – P150A GMC

P150A GMC Code - Transmission Output Speed Signal Circuit

Quick Answer

The Vehicle Speed Sensor (VSS), also called the Output Shaft Speed Sensor (OSS) creates an AC voltage as the rotor passes through the magnetic field of the sensor. Common causes include Faulty Transmission Output Speed Sensor, 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: P150A GMC indicates Transmission Output Speed Signal Circuit.
Common causes: Common causes include Faulty Transmission Output Speed Sensor, 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 2,818

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 Dec 18, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P150A GMC Description

The Vehicle Speed Sensor (VSS), also called the Output Shaft Speed Sensor (OSS) creates an AC voltage as the rotor passes through the magnetic field of the sensor. The Transmission Control Module (TCM) converts the AC into a vehicle speed signal, which is used to determine shift timing and Torque Converter Clutch (TCC) scheduling. The TCM also provides a Replicated Transmission Output Speed Signal (RTOSS) to the Engine Control Module (ECM)

OBDII Code P150A GMC - Transmission Output Speed Signal Circuit - AutoCodes.com — P150A GMC Code - Transmission Output Speed Signal Circuit

What does this mean?

What are the Possible Causes of the DTC P150A GMC?

Faulty Transmission Output Speed Sensor
Transmission Output Speed Sensor harness is open or shorted
Transmission Output Speed Sensor circuit poor electrical connection

How to Fix the DTC P150A 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 P150A 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.

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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 P150A GMC Code

1. What are common symptoms of OBDII code P150A GMC related to the Transmission Output Speed Signal Circuit?

The common symptoms include erratic or harsh shifting, delayed gear engagement, and the transmission going into limp mode.

2. What are the possible causes of OBDII code P150A GMC?

Potential causes of this code include a faulty transmission output speed sensor, damaged wiring or connectors in the circuit, or a malfunctioning transmission control module.

3. How can I diagnose the issue causing OBDII code P150A GMC?

Diagnosis typically involves using a scan tool to read the code, testing the transmission output speed sensor with a multimeter, and checking the wiring and connectors for any damage or corrosion.

4. What are the repair options for resolving OBDII code P150A GMC?

Repair options may include replacing the transmission output speed sensor, repairing or replacing damaged wiring or connectors, or reprogramming the transmission control module.

5. Can driving with OBDII code P150A GMC cause further damage to the vehicle?

Continuing to drive with this code can potentially cause further damage to the transmission due to improper shifting and increased stress on components. It is recommended to address the issue promptly.

6. How long does it typically take to fix OBDII code P150A GMC?

The repair time can vary depending on the exact cause of the code and the complexity of the repair. It can take anywhere from a few hours to a full day to diagnose and fix the issue.

7. Is it safe to continue driving my vehicle with OBDII code P150A GMC?

It is not recommended to drive the vehicle with this code present, as it can lead to further transmission problems and potentially unsafe driving conditions. It's best to address the issue as soon as possible.

8. Can I reset OBDII code P150A GMC on my own?

While you can clear the code with a scan tool, it is important to diagnose and fix the underlying issue causing the code to prevent it from returning.

9. Are there any preventative measures to avoid OBDII code P150A GMC in the future?

Regular maintenance of the transmission system, including checking and replacing sensors as needed, can help prevent issues like OBDII code P150A GMC from occurring.

10. Will fixing OBDII code P150A GMC improve my vehicle's performance?

Fixing this code can lead to smoother shifting, improved transmission performance, and overall better driving experience, especially if the issue was causing noticeable symptoms.