What is P0731 : Engine Error code Causes Explained
This Guide covers the P0731 engine error code, which signals a gearbox problem. It indicates the gearbox cannot shift into first gear, usually owing to shift solenoids or internal transmission components.
How to Identify a DTCs Number
The DTC (Diagnostic Trouble Code) P0731 refers to a “Gear 1 Incorrect Ratio” in the engine’s transmission system. To identify a P0731 error, you would typically use an OBD-II scanner to retrieve the DTC.
Understand that the trouble codes (DTCs) are 5 characters: 1 letter, 4 numbers. P-Powertrain indicates the fault code’s location. Generic or manufacturer-specific codes are indicated by the first digit. The second digit denotes the subsystem (7=transmission). The last two numbers describe the issue.
When this error occurs, the vehicle may experience poor acceleration, rough shifting, or failure to move when the car is put into drive.
Causes of P0731 Code:
- Transmission fluid issues:
Low fluid level or contaminated fluid which can affect the transmission’s ability to shift properly into first gear. - Faulty shift solenoids:
The solenoid responsible for engaging first gear could be malfunctioning, causing the gear
ratio to be incorrect. - Transmission control module (TCM) malfunction:
If the TCM is not sending the correct signals to the transmission, it can result in an incorrect gear ratio. - Clogged transmission filter.
A clogged filter can restrict fluid flow and impact the transmission’s ability to shift properly. - Internal transmission problems:
Worn or damaged internal components within the transmission, such as the forward clutch or valve body.
Risk Level of P0731 Error Code:
The medium risk level associated with this P0731 error code appears because it can potentially cause the vehicle to experience noticeable performance issues
The medium risk level suggests that while the problem may not immediately cause the vehicle to stop running, it can worsen over time, leading to more severe transmission damage if neglected.
Common Car Brands Affected by P0731 Code:
The P0731 engine error code is commonly found in following list.
- Ford
- Chrysler
- Chevrolet
- Toyota
- Honda
Video: P0731 Engine Error code
FAQ’s
What does the P0731 error code mean?
The P0731 error code indicates a problem with the transmission’s gear ratio for first gear, meaning the ratio is incorrect or outside the expected range.
What causes the P0731 error code?
Common causes include low transmission fluid, a malfunctioning transmission solenoid, damaged wiring, or a faulty transmission control module (TCM).
What is the risk level of the P0731 error code?
The risk level of the P0731 error code is medium. While it doesn’t immediately threaten safety, it can lead to poor vehicle performance or transmission damage if left unaddressed.