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 thinks the part that measures how fast the wheels are turning is giving numbers that are too high. It's like if your speedometer suddenly showed you were going super fast when you weren't.
The P1814 code is triggered when the transmission control module (TCM) detects an unusually high gradient or change in the output shaft speed sensor readings.
The output shaft speed sensor monitors the rotational speed of the transmission's output shaft. The TCM uses this data to control shifting and other transmission functions. If the sensor's readings change too rapidly or are higher than expected, the TCM will set the P1814 code.
• Erratic or harsh shifting
• Transmission slipping
• Check Engine Light illuminated
• Faulty output shaft speed sensor
• Wiring issues or poor connections in the sensor circuit
• Transmission fluid problems
Transmission Control Module (TCM): A computer that controls the transmission's functions.
Output Shaft: The part of the transmission that transfers power to the wheels.
• Use an OBD-II scanner to confirm the code.
• Inspect the output shaft speed sensor and its wiring for damage.
• Check transmission fluid level and condition.
• Replace the output shaft speed sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Change or top up transmission fluid if needed.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly check and maintain transmission fluid levels.
• Inspect sensor wiring during routine maintenance.
• Avoid aggressive driving habits that can stress the transmission.
Sensor Issue
• Have the vehicle inspected by a professional if you notice shifting issues.
• Do not ignore the Check Engine Light; it can lead to further damage.
Check with your vehicle manufacturer for specific warranty coverage on transmission components.
This code has been commonly associated with sensor failures and wiring issues in older vehicles.
Moderate – It is important to address this issue to prevent potential transmission damage.
Driving with transmission issues can be unsafe and may lead to further mechanical damage.
• Vehicle at operating temperature
• On a level surface
The output shaft speed sensor is typically located on the transmission housing near the output shaft.
Q: Can I drive with a P1814 code?
A: It's not recommended to drive for long periods with this code, as it can lead to transmission damage.
Q: How can I reset the P1814 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is fixed, it should not return.
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