What is the P0729 fault code What is the description for Gear 6 Incorrect Gear Ratio Failure? How do you fix the P0729 fault code What are the causes and symptoms of the P0729 error code?
What is the P0729 Fault code? What does it signify?
If an automatic transmission vehicle experiences difficulty shifting to 6th or while driving in 6th, the fault code P0729 will be displayed. This code is issued when the 6th-gear ratio does not comply with the manufacturer’s default standards.
Modern vehicles equipped with automatic transmission/transaxle use a torque converter between engine and transmission to increase engine torque output and drive the rear wheels. The computer-controlled, automatic transmission employs multiple gear ratios to increase vehicle speeds without affecting engine power. Modern vehicles can have multiple gear ratios to improve fuel efficiency. Based on vehicle speed and throttle position, the powertrain control module (PCM), determines whether to increase or decrease the gear.
The ratio of gears is the difference in the rotational speeds between two gears with different diameters. The output speed divided by the input speeds is how the gear ratio is calculated. To determine these values, both the input speed and output speed sensors can be used in transmission.
The Transmission Control Module or Powertrain Control Module (TCM), uses data from both these sensors to determine the gear ratio and torque converter shiftpage. If the PCM finds that the sixth gear is not at the desired value, the code P0729 is activated.
The P0729 fault code can affect vehicles of various makes and models, including Dodge, Chrysler, Volkswagen (GMC), Chevrolet, Duramax Nissan, Infiniti, Lexus, Dodge, Chrysler, Dodge, Lexus, Dodge, Chrysler, Dodge, Infiniti, Lexus, Infiniti, Infiniti, Lexus, Dodge, Chrysler, Dodge, Chrysler, Dodge, Chevrolet, GMC.
What causes the P0729 Fault code?
Below are some reasons to set fault code P0729:
- – Low transmission oil
- Transmission oil leaks
- Filtering the hydraulic passages of your transmission oil or transmission oil is a sign that you have a dirty filter.
- – Broken or worn connectors
- – A defective solenoid 6th gear
- – A mechanical problem in the transmission.
- – Defective hydraulic controller unit
- – Defective transmission pump
- – Defective torque converter clutch
- – Defective transmission control module (TCM), or PCM.
What are the symptoms for P0729 Malfunction Codes?
You may experience the following symptoms if your vehicle has the code P0729:
- – Illumination for check engine light
- – Delayed shifting
- – Vehicle does not shift into 6th Gear or is stuck in 6th Gear
- Gearbox shifting in and out of gears
- – Increased fuel consumption
- Unexpected engine stop
How do I fix the P0729 fault code?
- – Filling in the gaps with transmission oil
- After flushing the system, change any oil that is dirty or burned.
- – Replacing a damaged shift solenoid
- – Replacing damaged connectors or cables in the transmission control system
- – Repairing a solenoid harness with a shorted, or open shift.
- – Repair of clogged transmission cables
- – Repair and replacement of damaged transmission or torque converter parts
- – Repair or reprogramming of an inoperable TCM or PCM
How serious is the P0729 Fault code?
Depending on the severity of the symptoms, fault code P0729 may vary. Some situations can cause serious transmission problems, while others are not severe enough to affect driving performance. Whatever the outcome, transmission issues should be addressed immediately. A vehicle equipped with a defective transmission is not recommended.
