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 having trouble reading the temperature of the air going into the engine on one side. It's like when a thermometer isn't working right and you can't tell how hot or cold it is.
The P3190 code indicates an issue with the intake air temperature sensor on bank 2, where the sensor readings are outside the expected range.
The intake air temperature (IAT) sensor measures the temperature of the air entering the engine. This information is used by the engine control module (ECM) to optimize fuel delivery and ignition timing. A P3190 code is set when the ECM detects that the IAT sensor readings on bank 2 are not within the expected range, which could be due to a sensor malfunction, wiring issue, or other related problems.
• Check Engine Light is on
• Poor engine performance
• Reduced fuel efficiency
• Faulty intake air temperature sensor
• Wiring issues or poor connections
• ECM malfunction
ECM: Engine Control Module
IAT: Intake Air Temperature
• Use an OBD-II scanner to confirm the P3190 code.
• Inspect the wiring and connections to the intake air temperature sensor on bank 2.
• Test the intake air temperature sensor for proper operation.
• Replace the faulty intake air temperature sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Toyota Prius
• Lexus RX
• Honda Accord
• Regularly inspect and clean the intake air temperature sensor.
• Ensure all electrical connections are secure and free of corrosion.
• Perform routine maintenance checks on the engine's air intake system.
Sensor Issue
• Do not ignore the Check Engine Light; address the issue promptly.
• Consider using a fuel system cleaner to maintain sensor performance.
Sensor issues may be covered under the vehicle's emissions warranty.
P3190 is not a very common code, but it has been reported in vehicles with high mileage or those exposed to harsh environmental conditions.
Moderate – While the vehicle may still be drivable, it is important to address the issue to prevent further engine performance problems.
Driving with a malfunctioning intake air temperature sensor may lead to increased emissions and reduced fuel efficiency, which can be against emissions regulations.
• Engine at operating temperature
• Vehicle in a safe, stationary position
The intake air temperature sensor is typically located in the air intake duct or manifold on bank 2 of the engine.
Q: Can I drive my car with a P3190 code?
A: While you can drive with this code, it's best to fix it soon to avoid engine performance issues.
Q: How do I reset the Check Engine Light after fixing the P3190 code?
A: Use an OBD-II scanner to clear the code, or disconnect the battery for a few minutes to reset the ECM.
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Universal · Digital multimeter
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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.