P0729 2016 Chevrolet Silverado Code - Transmission 6th 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
- P0729 2016 Chevrolet Silverado indicates Transmission 6th 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 P0729 2016 Chevrolet Silverado 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 6th gear commanded differs from the known 6th gear ratio for 2 s.
What are the Possible Causes of the DTC P0729 2016 Chevrolet Silverado?
- Low transmission fluid level
- Shift solenoid mechanical fault
- Faulty Turbine Sensor
- Faulty Output Speed Sensor
How to Fix the DTC P0729 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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0729 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.
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Frequently Asked Questions about P0729 2016 Chevrolet Silverado Code
1. What does the OBDII code P0729 mean on a 2016 Chevrolet Silverado?
P0729 indicates that the transmission control module (TCM) has detected an incorrect gear ratio in 6th gear, which could be caused by mechanical or electronic issues.
2. What are the common symptoms of code P0729 in a 2016 Chevrolet Silverado?
Symptoms may include difficulty shifting into or out of 6th gear, slipping in 6th gear, poor acceleration or fuel economy, and the check engine light being illuminated.
3. What causes the P0729 code in a 2016 Chevrolet Silverado?
Common causes include low or dirty transmission fluid, a malfunctioning shift solenoid, a damaged transmission gear or clutch, or a faulty transmission control module (TCM).
4. Can driving with the P0729 code damage my 2016 Chevrolet Silverado?
Yes, continuing to drive with this code can cause further damage to the transmission, so it’s best to address the issue promptly.
5. How is the P0729 code diagnosed?
A mechanic will typically use a scan tool to verify the code, check transmission fluid levels and condition, inspect wiring and connectors, and test the operation of the shift solenoids.
6. How can I fix the P0729 code on my 2016 Chevrolet Silverado?
Repairs may include replacing low or dirty transmission fluid, repairing or replacing damaged wiring or connectors, replacing a faulty shift solenoid, or addressing internal transmission damage.
7. Can low transmission fluid cause the P0729 code?
Yes, low or dirty transmission fluid can cause improper gear ratios, leading to the P0729 code.
8. How much does it cost to repair the P0729 code on a 2016 Chevrolet Silverado?
Repair costs vary depending on the issue, ranging from $100–$300 for fluid and solenoid issues to $1,000 or more for internal transmission repairs.
9. Can I clear the P0729 code without fixing the problem?
Clearing the code without addressing the root cause may turn off the check engine light temporarily, but the issue will likely reoccur, potentially causing further transmission damage.
10. Is the P0729 code specific to 6th gear in the 2016 Chevrolet Silverado?
Yes, the P0729 code specifically indicates an incorrect gear ratio detected in 6th gear by the transmission control module.
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