Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer found a problem with the part that controls the transmission, so it's making the car drive in a safe mode to prevent damage.
The Transmission Control Module (TCM) has detected an internal issue that affects its ability to control the transmission properly, triggering a limp mode to protect the vehicle.
The P1933 code indicates that the TCM has identified a Level 2 error within its internal monitoring systems. This error has prompted the TCM to activate a 'Limp Home' mode, which restricts the transmission to a limited range of gears to prevent further damage.
• Vehicle stuck in a single gear
• Check Engine Light illuminated
• Reduced engine performance
• Faulty Transmission Control Module (TCM)
• Software glitch in the TCM
• Electrical issues such as damaged wiring or connectors
Transmission Control Module (TCM): A computer that controls the transmission's functions.
Limp Home Mode: A safety feature that limits the vehicle's speed and gear range to prevent damage.
• Use an OBD-II scanner to confirm the code.
• Inspect the TCM and related wiring for damage.
• Check for software updates or reflash the TCM.
• Replace or repair the TCM if faulty.
• Repair or replace damaged wiring or connectors.
• Update or reflash TCM software if necessary.
• OBD-II Scanner
• Multimeter
• Basic hand tools
$300 - $1,200
Moderate
• Ford Focus
• Ford Fusion
• Ford Escape
• Regular maintenance of transmission system
• Ensure TCM software is up to date
• Inspect wiring regularly for wear and tear
Transmission Control Issue
• Avoid driving at high speeds until repaired.
• Seek professional diagnosis promptly.
Check with your vehicle manufacturer for warranty coverage on transmission components.
This code has been associated with known issues in certain Ford models, often requiring TCM replacement or reprogramming.
High – Driving in limp mode can prevent further damage but should be addressed immediately to restore normal operation.
Driving with a malfunctioning transmission can be unsafe. Address the issue promptly to ensure vehicle safety.
• Vehicle at operating temperature
• Transmission in normal driving mode
The Transmission Control Module is typically located in the engine bay or under the dashboard, depending on the vehicle model.
Q: Can I drive my car with a P1933 code?
A: You can drive short distances in limp mode, but it's best to have it repaired as soon as possible.
Q: Will resetting the code fix the problem?
A: Resetting the code may clear the light temporarily, but it won't fix the underlying issue.
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