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 thinks the wrong gear was picked, which might make driving unsafe.
This code indicates that the vehicle's transmission control module (TCM) has detected a gear selection that does not match the expected gear for safe operation.
The P189C code is triggered when the transmission control module identifies a mismatch between the selected gear and the gear that should be engaged based on the vehicle's speed and engine load. This can occur due to a malfunction in the gear selector, issues with the transmission solenoids, or a problem in the TCM software.
• Check Engine Light is on
• Vehicle may not shift properly
• Transmission warning light is illuminated
• Faulty gear selector
• Transmission solenoid malfunction
• TCM software error
TCM: Transmission Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Check for any other diagnostic trouble codes.
• Inspect the gear selector for damage or wear.
• Test the transmission solenoids for proper operation.
• Replace or repair the gear selector.
• Replace faulty transmission solenoids.
• Reprogram or update the TCM software.
• OBD-II scanner
• Multimeter
• Transmission fluid pressure tester
$200 - $800
Moderate
• Ford Focus
• Chevrolet Malibu
• Toyota Camry
• Regular transmission maintenance
• Ensure proper fluid levels
• Avoid aggressive driving habits
Transmission Issue
• Drive cautiously until the issue is resolved.
• Avoid long trips if possible.
• Consult a professional mechanic for diagnosis.
Check with the vehicle manufacturer for powertrain warranty coverage.
This code has been associated with vehicles experiencing transmission issues due to electronic control failures.
High – This issue can affect vehicle drivability and safety.
Operating a vehicle with transmission issues can be unsafe and may violate vehicle safety standards.
• Vehicle must be in drive mode.
• Engine running at normal operating temperature.
The transmission control module is typically located near the transmission or under the dashboard.
Q: Can I drive my car with a P189C code?
A: It's not recommended to drive with this code as it may affect vehicle safety.
Q: Will resetting the code fix the problem?
A: Resetting the code without addressing the underlying issue will not fix the problem.
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