P0734 2015 Chevrolet Silverado Code - Transmission 4th 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
- P0734 2015 Chevrolet Silverado indicates Transmission 4th 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 P0734 2015 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 4th gear commanded differs from the known 6th gear ratio for 2 s.
What are the Possible Causes of the DTC P0734 2015 Chevrolet Silverado?
- Low transmission fluid level
- Shift solenoid mechanical fault
- Faulty Turbine Sensor
- Faulty Output Speed Sensor
How to Fix the DTC P0734 2015 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 P0734 2015 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 P0734 2015 Chevrolet Silverado Code
What does the OBDII code P0734 mean on a 2015 Chevrolet Silverado?
The P0734 code indicates that the transmission’s control module detects a problem with the 4th gear ratio. Specifically, it suggests that the gear ratio in 4th gear is incorrect, deviating from the manufacturer's specifications.
What are common symptoms of code P0734 in a 2015 Chevrolet Silverado?
Symptoms of this error code may include harsh shifting, the transmission slipping, the vehicle not accelerating as it should, the Check Engine Light coming on, and in some cases, the transmission may go into a fail-safe mode.
What causes the P0734 code to appear on my 2015 Chevrolet Silverado?
Common causes for the P0734 code include issues like a faulty shift solenoid, transmission fluid that is low or of poor quality, mechanical wear inside the transmission (such as worn gear teeth), or problems with the transmission control module.
How can I fix the P0734 code on a 2015 Chevrolet Silverado?
Repairing this code might involve replacing or cleaning the shift solenoids, changing the transmission fluid and filter if it's contaminated or old, repairing or replacing damaged components inside the transmission, or reprogramming or replacing the transmission control module.
Is it safe to drive my 2015 Chevrolet Silverado with the P0734 code?
Driving with the P0734 code can lead to further damage to the transmission. It is advisable to address the issue as soon as possible to prevent additional complications and ensure safe driving conditions.
How urgent is it to fix a P0734 code on a 2015 Chevrolet Silverado?
It is quite urgent to fix this issue, as ignoring it could lead to more serious damage to the transmission, potentially resulting in expensive repairs. Immediate attention is recommended to avoid further damage to the vehicle.
Can a P0734 code decrease the fuel efficiency of my 2015 Chevrolet Silverado?
Yes, when the transmission is not operating efficiently due to issues like those indicated by the P0734 code, it can lead to decreased fuel efficiency. This is because the engine may have to work harder due to the transmission problems.
What tools are required to diagnose the P0734 code in a 2015 Chevrolet Silverado?
Diagnosing the P0734 code typically requires an OBD-II scanner to read the code and monitor live data, a multimeter for electrical testing, and possibly a pressure gauge to check the transmission fluid pressure.
Discuss the causes and fixes for P0734 2015 Chevrolet Silverado OBDII Code
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