Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is having trouble communicating with the part that controls the gears in the car. It's like when your game controller isn't working right with your console.
The P1746 code indicates an error in the output stage of the Transmission Control Module (TCM), which affects the transmission's ability to shift gears properly.
The Transmission Control Module (TCM) is responsible for controlling the transmission's functions. The output stage refers to the part of the TCM that sends signals to the transmission to engage the appropriate gears. An error in this stage means the TCM is unable to properly communicate with the transmission, potentially causing shifting issues.
• Transmission slipping
• Harsh or erratic shifting
• Check Engine Light illuminated
• Faulty Transmission Control Module (TCM)
• Damaged wiring or connectors
• Internal transmission issues
Transmission Control Module (TCM): A computer that controls the functions of the transmission.
OBD-II: On-Board Diagnostics, a system that monitors vehicle performance and reports issues.
• Check for other related codes
• Inspect wiring and connectors to the TCM
• Test the TCM for proper operation
• Repair or replace damaged wiring/connectors
• Replace the Transmission Control Module
• Perform a transmission service
• OBD-II scanner
• Multimeter
• Basic hand tools
$300 - $1200
Moderate
• Ford F-150
• Lincoln Navigator
• Mercury Mountaineer
• Regular transmission maintenance
• Inspect wiring harnesses periodically
• Avoid harsh driving conditions
Transmission Control Issue
• Avoid driving at high speeds until repaired
• Consult with a certified mechanic
• Regularly check transmission fluid levels
Check with the vehicle manufacturer for specific warranty coverage on the transmission system.
P1746 is a common code in vehicles with electronic transmission control systems, often due to wear and tear or electrical issues.
Moderate – It is recommended to address this issue soon to prevent further transmission damage.
Ignoring transmission issues can lead to safety hazards and further vehicle damage. Always consult a professional mechanic for repairs.
• Vehicle at operating temperature
• Transmission in drive mode
The Transmission Control Module is typically located near the transmission or under the dashboard, depending on the vehicle model.
Q: Can I drive my car with a P1746 code?
A: It's not recommended to drive for long periods with this code, as it may cause further transmission damage.
Q: How do I reset the P1746 code?
A: You can reset the code using an OBD-II scanner, but it's important to fix the underlying issue first.
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