P0732 2015 GMC Sierra Code - Transmission 2nd 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
- P0732 2015 GMC Sierra indicates Transmission 2nd 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.
Code P0732 2015 GMC Sierra Description
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 2nd gear commanded differs from the known 6th gear ratio for 2 s.
What are the Possible Causes of the DTC P0732 2015 GMC Sierra?
- Low transmission fluid level
- Shift solenoid mechanical fault
- Faulty Turbine Sensor
- Faulty Output Speed Sensor
How to Fix the DTC P0732 2015 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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0732 2015 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 P0732 2015 GMC Sierra code?
Need more information on how to fix the P0732 2015 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0732 2015 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0732 2015 GMC Sierra Code
1. What does the OBDII code P0732 mean on a 2015 GMC Sierra?
P0732 indicates that the transmission control module (TCM) has detected an incorrect gear ratio in 2nd gear, which suggests a potential issue with the transmission or related components.
2. What are the common symptoms of code P0732 in a 2015 GMC Sierra?
Symptoms may include slipping or difficulty shifting into 2nd gear, poor acceleration, reduced fuel efficiency, transmission overheating, or the illumination of the check engine light.
3. What causes the P0732 code to appear on a 2015 GMC Sierra?
Common causes include low transmission fluid, a faulty shift solenoid, damaged wiring or connectors, a worn clutch pack, or internal transmission issues such as gear damage.
4. Can low transmission fluid cause the P0732 code in a 2015 GMC Sierra?
Yes, low or dirty transmission fluid can cause improper hydraulic pressure, leading to an incorrect gear ratio in 2nd gear and triggering the P0732 code.
5. How do you diagnose the P0732 code on a 2015 GMC Sierra?
Diagnosis typically involves checking the transmission fluid level and condition, inspecting wiring and connectors, testing the shift solenoids, and potentially performing a pressure test or internal transmission inspection.
6. Can driving with the P0732 code damage the transmission on a 2015 GMC Sierra?
Yes, continuing to drive with this code can lead to further damage, especially if it’s caused by low fluid, slipping gears, or internal transmission problems.
7. What repairs might fix the P0732 code on a 2015 GMC Sierra?
Repairs could include topping off or replacing transmission fluid, repairing or replacing faulty shift solenoids, fixing damaged wiring, or rebuilding the transmission if internal components are worn.
8. How much does it cost to fix the P0732 code on a 2015 GMC Sierra?
Repair costs vary widely depending on the cause, ranging from $100-$300 for fluid changes or solenoid replacements to $1,000 or more for internal transmission repairs.
9. Can a bad speed sensor trigger the P0732 code in a 2015 GMC Sierra?
Yes, a faulty input or output speed sensor can send incorrect data to the TCM, leading to gear ratio errors like the P0732 code.
10. Is the P0732 code a serious issue for a 2015 GMC Sierra?
Yes, this code indicates a transmission problem that should be addressed promptly to avoid further damage or unsafe driving conditions.
Discuss the causes and fixes for P0732 2015 GMC Sierra OBDII Code
Code P0732 2015 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
