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 a sensor inside the car's computer is not working right. It's like a thermometer that helps the computer know how hot it is inside, and it's not giving the right numbers.
The P0667 code indicates an issue with the internal temperature sensor of the control module, which is not performing within the expected range.
The control module, often referred to as the engine control unit (ECU), has an internal temperature sensor (Sensor A) that monitors the temperature inside the module. This sensor ensures that the module operates within safe temperature limits. If the sensor reports values outside the expected range or fails to report, the P0667 code is triggered.
• Check Engine Light illuminated
• Engine performance issues
• Inconsistent vehicle operation
• Potential stalling or misfires
• Faulty internal temperature sensor
• Wiring issues or poor connections
• ECU overheating
• Software malfunction
ECU: Engine Control Unit, the computer that controls engine functions.
OBD-II: On-Board Diagnostics, a standardized system for diagnosing vehicle issues.
• Use an OBD-II scanner to confirm the code.
• Inspect the ECU for signs of overheating.
• Check wiring and connections to the ECU.
• Test the internal temperature sensor for proper operation.
• Replace the faulty internal temperature sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or update ECU software.
• Replace the ECU if necessary.
• OBD-II Scanner
• Multimeter
• Screwdrivers
• Wiring repair kit
$200 - $800
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly check and maintain vehicle cooling systems.
• Ensure proper ventilation around the ECU.
• Perform regular software updates.
Sensor Issue
• Avoid driving the vehicle until the issue is resolved to prevent further damage.
• Consult a professional mechanic for accurate diagnosis and repair.
Check with your vehicle manufacturer for warranty coverage on ECU-related issues.
This code has been reported in vehicles with aging ECUs or those exposed to extreme temperatures.
Moderate – Addressing this code promptly can prevent further damage to the vehicle's control systems.
Driving with a malfunctioning ECU sensor can lead to unexpected vehicle behavior, posing safety risks.
• Engine at operating temperature
• Vehicle in a controlled environment
The ECU is typically located in the engine bay or under the dashboard, depending on the vehicle model.
Q: Can I drive my car with a P0667 code?
A: It's not recommended to drive with this code, as it may lead to further issues or unsafe driving conditions.
Q: How do I reset the P0667 code?
A: After fixing the issue, you can use an OBD-II scanner to clear the code. If the problem persists, the code will reappear.
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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.
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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.
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Fitment Required · Vehicle-fitment part
Commonly relevant for misfire, ignition-efficiency, and some drivability-related repairs.
Misfire and ignition-related faults commonly involve spark plugs as part of the repair path.
Check the correct plug type, gap, and engine application for your vehicle.
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Fitment Required · Vehicle-fitment part
Relevant when the fault points toward ignition-coil performance or cylinder-specific ignition issues.
Some ignition faults involve coil performance or cylinder-specific coil problems.
Match the coil to your engine and confirm the failed component before ordering.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.