AutoCodes – Chevrolet – P0731 2016 Chevrolet Silverado

P0731 2016 Chevrolet Silverado Code - Transmission 1st Gear Ratio Incorrect

Quick Answer

The transmission turbine speed sensor and vehicle speed sensor are hall-effect sensors. Common causes include Low transmission fluid level, Shift solenoid mechanical fault, Faulty Turbine Sensor. 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: P0731 2016 Chevrolet Silverado indicates Transmission 1st Gear Ratio Incorrect.
Common causes: Common causes include Low transmission fluid level, Shift solenoid mechanical fault, Faulty Turbine Sensor.
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 457

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
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0731 2016 Chevrolet Silverado Description

The transmission turbine speed sensor and vehicle speed sensor are hall-effect sensors. The turbine speed sensor is mounted to the transmission housing and faces the reluctor attached to the 1-2-3-4-5-6 clutch piston housing. The vehicle speed sensor is mounted to the low and reverse clutch housing on 2WD, or transfer case rear case half on 4WD. The vehicle speed sensor faces a reluctor wheel attached to the transmission output shaft on 2WD, or a reluctor wheel attached to the transfer case rear output shaft on 4WD.
The TCM provides a 9 V reference circuit and a signal circuit to each of the sensors. As the 1-2-3-4-5-6 clutch piston housing and transmission output shaft or transfer case output rotates, the sensors produce a signal frequency based on the teeth on the reluctor wheel. The TCM calculates the transmission gear ratio based on the speed sensor signals and compares the calculated gear ratio to the commanded gear ratio.
The Diagnostic Trouble Code (DTC) will be set when the TCM detects the calculated gear ratio with 1st gear commanded differs from the known 1st gear ratio for 2 s.

OBDII Code P0731 2016 Chevrolet Silverado - Transmission 1st Gear Ratio Incorrect - AutoCodes.com — P0731 2016 Chevrolet Silverado Code - Transmission 1st Gear Ratio Incorrect

What does this mean?

What are the Possible Causes of the DTC P0731 2016 Chevrolet Silverado?

Low transmission fluid level
Shift solenoid mechanical fault
Faulty Turbine Sensor
Faulty Output Speed Sensor

How to Fix the DTC P0731 2016 Chevrolet Silverado?

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 does this mean?

Code Tech Notes

Incorrect ratio Diagnostic Trouble Code (DTC) may indicate a component condition with piston seals, clutch plates, or solenoids or it may be caused by a faulty turbine or output speed sensor signal.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0731 2016 Chevrolet Silverado 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 P0731 2016 Chevrolet Silverado 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 P0731 2016 Chevrolet Silverado Code

1. What does the OBDII code P0731 mean on a 2016 Chevrolet Silverado?

P0731 indicates that the transmission control module (TCM) has detected an incorrect gear ratio in 1st gear, meaning the input and output speed sensors are not matching expected values.

2. What are the common symptoms of a P0731 code in a 2016 Silverado?

Symptoms may include difficulty shifting into or out of 1st gear, slipping in 1st gear, reduced acceleration, harsh shifting, illuminated check engine light, and reduced fuel efficiency.

3. What causes the P0731 code to appear in a 2016 Chevrolet Silverado?

Common causes include low or dirty transmission fluid, a faulty transmission control module (TCM), damaged or worn transmission bands, a failed torque converter, or faulty speed sensors.

4. Can driving with a P0731 code damage my 2016 Silverado?

Yes, prolonged driving with this code can cause further damage to the transmission, such as overheating or excessive wear, leading to higher repair costs.

5. How do I diagnose a P0731 code on my 2016 Silverado?

Diagnosis involves checking the transmission fluid level and condition, inspecting the wiring and connectors, testing the input and output speed sensors, and performing a TCM scan for additional codes.

6. Is low transmission fluid a common cause of a P0731 code?

Yes, low or contaminated transmission fluid can cause the transmission to malfunction and trigger the P0731 code.

7. How much does it cost to repair a P0731 code on a 2016 Chevrolet Silverado?

Repair costs can vary widely depending on the cause, ranging from $100 for fluid service to over $1,500 for transmission repairs or replacements.

8. Can a faulty speed sensor cause a P0731 code in a 2016 Silverado?

Yes, a faulty input or output speed sensor can send incorrect data to the TCM, leading to the P0731 code.

9. Can I fix the P0731 code on my 2016 Silverado by resetting the TCM?

Resetting the TCM may temporarily clear the code, but the underlying issue must be resolved to prevent the code from returning.

10. Should I stop driving my 2016 Silverado if the P0731 code appears?

It is recommended to address the issue promptly and avoid driving extensively, as continued operation with transmission issues can cause further damage.