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 is getting a strange reading from a sensor that checks how hot the transmission fluid is. It's like a thermometer giving a reading that doesn't make sense.
The vehicle's computer has detected an implausible temperature reading from the Transmission Fluid Temperature Sensor 'C'. This could mean the sensor is faulty or there's an issue with the transmission fluid itself.
The P186E code is triggered when the Transmission Control Module (TCM) receives a temperature reading from the Transmission Fluid Temperature Sensor 'C' that falls outside the expected range. This can indicate a sensor malfunction, wiring issues, or abnormal transmission fluid conditions.
• Check Engine Light is on
• Transmission may shift harshly
• Transmission may overheat
• Faulty Transmission Fluid Temperature Sensor 'C'
• Wiring or connector issues in the sensor circuit
• Abnormal transmission fluid conditions
Transmission Fluid: The fluid used to lubricate and cool the components of a vehicle's transmission.
Sensor: A device that detects or measures a physical property and records, indicates, or otherwise responds to it.
• Use an OBD-II scanner to confirm the code
• Inspect the wiring and connectors for damage
• Test the Transmission Fluid Temperature Sensor 'C'
• Replace the Transmission Fluid Temperature Sensor 'C'
• Repair or replace damaged wiring or connectors
• Change the transmission fluid if necessary
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly check and maintain transmission fluid levels
• Inspect wiring and connectors periodically
• Schedule routine transmission maintenance
Sensor Issue
• Avoid driving aggressively until the issue is resolved
• Monitor transmission performance and temperature
• Consult a professional mechanic if unsure
Check with your vehicle manufacturer for warranty coverage on transmission components.
This code has been associated with sensor failures and wiring issues in various vehicle models.
Moderate – Address promptly to avoid potential transmission damage.
Driving with a faulty transmission sensor can lead to unsafe driving conditions.
• Engine running
• Transmission at operating temperature
The Transmission Fluid Temperature Sensor 'C' is typically located inside the transmission or near the transmission fluid pan.
Q: Can I drive with a P186E code?
A: It's not recommended to drive for extended periods with this code, as it may lead to transmission damage.
Q: How do I clear a P186E code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is fixed, the code should not return.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
View on Amazon
Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.