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 found a problem with the part that controls the transmission. The car might not drive as smoothly and could be in a 'safe mode' to prevent damage.
The Transmission Control Module (TCM) has detected an internal error. This triggers a 'limp home' mode to protect the transmission from further damage.
The P1930 code indicates that the Transmission Control Module (TCM) has detected an internal fault that affects its ability to properly control the transmission. This fault triggers a Level 2 error, causing the vehicle to enter 'Limp Home' mode, which restricts performance to prevent further damage.
• Reduced engine power
• Transmission stuck in one gear
• Check Engine Light illuminated
• Faulty Transmission Control Module
• Software glitch in the TCM
• Electrical issues such as poor connections or damaged wiring
Transmission Control Module (TCM): An electronic component that controls the transmission's operation.
Limp Home Mode: A safety mode that restricts vehicle performance to prevent damage.
• Perform a diagnostic scan to confirm the code
• Inspect TCM and related wiring for damage
• Check for software updates or reflash the TCM
• Replace or repair the Transmission Control Module
• Repair or replace damaged wiring or connectors
• Update or reflash TCM software
• OBD-II scanner
• Multimeter
• Screwdriver set
$300 - $1200
Moderate
• Ford F-150
• Chevrolet Silverado
• Dodge Ram
• Regular maintenance and inspection of the transmission system
• Ensure software updates are applied promptly
• Avoid harsh driving conditions that may stress the transmission
Transmission Control Module Issue
• Avoid driving the vehicle until repaired to prevent further damage
• Consult with a professional mechanic for a thorough diagnosis
Check if the vehicle's powertrain warranty covers TCM repairs.
This code has been associated with issues in vehicles with electronic transmission controls, especially in models with complex TCM systems.
High – It is important to address this issue promptly to avoid transmission damage.
Driving with a malfunctioning transmission can be dangerous and may lead to more severe mechanical failures.
• Vehicle must be in operation
• Transmission module must be active
The Transmission Control Module is usually located near the transmission or under the dashboard.
Q: Can I drive my car with a P1930 code?
A: It's not recommended, as it may cause further damage to the transmission.
Q: What does 'Limp Home' mode mean?
A: 'Limp Home' mode is a safety feature that limits vehicle performance to prevent damage.
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