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 fluid in the transmission is getting too hot. It's like when you have a fever and your temperature is too high.
The transmission fluid temperature sensor is reporting a temperature that is higher than the expected range, which can indicate a problem with the sensor or the transmission itself.
P187D is triggered when the Powertrain Control Module (PCM) detects a transmission fluid temperature reading from sensor 'B' that is above the normal operating range. This could be due to an actual overheating condition or a fault in the sensor or its circuit.
• Check Engine Light is on
• Transmission may shift erratically
• Overheating transmission
• Faulty transmission fluid temperature sensor
• Wiring issues such as short circuits or open circuits
• Transmission fluid overheating due to low levels or contamination
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to confirm the code
• Inspect the wiring and connections to the sensor
• Check the transmission fluid level and condition
• Replace the transmission fluid temperature sensor
• Repair or replace damaged wiring or connectors
• Flush and refill transmission fluid if contaminated
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly check and maintain transmission fluid levels
• Perform scheduled transmission maintenance
• Inspect wiring and connectors periodically
Sensor Issue
• Avoid driving aggressively to prevent further overheating
• Have the vehicle inspected by a professional if unsure about repairs
Check your vehicle's warranty for coverage on transmission components.
This code is common in vehicles with high mileage or those that have not had regular transmission maintenance.
Moderate – Addressing this issue promptly can prevent more severe transmission damage.
Ignoring this code can lead to transmission failure, which can be a safety hazard.
• Engine at operating temperature
• Vehicle in park or neutral
The transmission fluid temperature sensor is typically located on or near the transmission housing.
Q: Can I drive with a P187D code?
A: It's not recommended to drive for long periods with this code, as it may indicate an overheating transmission.
Q: How often should I check my transmission fluid?
A: It's a good practice to check your transmission fluid every 30,000 to 60,000 miles, or as recommended by your vehicle's manufacturer.
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