P0732 2016 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 2016 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 2016 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 2016 GMC Sierra?
- Low transmission fluid level
- Shift solenoid mechanical fault
- Faulty Turbine Sensor
- Faulty Output Speed Sensor
How to Fix the DTC P0732 2016 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 2016 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.
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Frequently Asked Questions about P0732 2016 GMC Sierra Code
1. What does the OBDII code P0732 mean on a 2016 GMC Sierra?
P0732 indicates that the Powertrain Control Module (PCM) has detected an incorrect gear ratio for 2nd gear in the transmission system.
2. What are the common symptoms of the P0732 code in a 2016 GMC Sierra?
Symptoms may include poor acceleration, slipping or harsh shifting in 2nd gear, reduced fuel efficiency, and the Check Engine Light turning on.
3. What causes the P0732 code in a 2016 GMC Sierra?
Common causes include low or dirty transmission fluid, a malfunctioning transmission solenoid, internal transmission damage, or a faulty PCM.
4. Can driving with the P0732 code damage my GMC Sierra further?
Yes, driving with this code can lead to increased wear on the transmission and potential long-term damage if the issue is not resolved.
5. How do I diagnose the P0732 code on my 2016 GMC Sierra?
Diagnosis involves checking the transmission fluid level and condition, inspecting wiring and connectors, testing the transmission solenoids, and performing a pressure test on the transmission.
6. How do I fix the P0732 code on a 2016 GMC Sierra?
Repairs may include replacing or refilling the transmission fluid, repairing faulty wiring, replacing a defective transmission solenoid, or rebuilding the transmission.
7. Can a low transmission fluid level cause the P0732 code?
Yes, low or dirty transmission fluid can cause improper gear engagement and trigger the P0732 code.
8. How much does it cost to fix the P0732 code on a GMC Sierra?
Repair costs can range from $150 for basic fixes like fluid replacement to over $2,000 for a full transmission rebuild or replacement, depending on the severity of the issue.
9. Can a faulty PCM cause the P0732 code in a 2016 GMC Sierra?
Yes, a malfunctioning PCM can fail to properly manage gear ratios and lead to the P0732 code, though this is less common.
10. Is the P0732 code specific to GMC Sierra trucks?
No, the P0732 code is a generic OBDII code that can appear in many vehicles with automatic transmissions, but its specific causes and solutions may vary by make and model.
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