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 detected a problem with the sensor that measures the temperature of the air going into the engine. It thinks the sensor is reading too high on one side of the engine.
The Intake Air Temperature (IAT) sensor measures the temperature of the air entering the engine. The engine control module (ECM) uses this information to adjust the air-fuel mixture. A 'circuit high' code indicates the sensor is reporting a higher temperature than expected.
The P3187 code is triggered when the ECM detects an unusually high voltage signal from the Intake Air Temperature sensor on Bank 2. This could mean the sensor is malfunctioning, there is a wiring issue, or the sensor is reading a temperature higher than the expected range.
• Check Engine Light is on
• Poor fuel economy
• Engine performance issues
• Rough idling
• Faulty Intake Air Temperature sensor
• Wiring issues such as shorts or open circuits
• Poor electrical connections
• Faulty ECM
ECM: Engine Control Module
IAT: Intake Air Temperature
• Use an OBD-II scanner to confirm the code
• Inspect the IAT sensor and its wiring for damage
• Check for loose or corroded connections
• Test the sensor's resistance and voltage
• Replace the faulty IAT sensor
• Repair or replace damaged wiring
• Clean and secure electrical connections
• Replace the ECM if necessary
• OBD-II scanner
• Multimeter
• Screwdriver set
$100 - $300
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regularly inspect and clean the IAT sensor
• Check wiring and connections during routine maintenance
• Use quality replacement parts
Sensor Issue
• Do not ignore the Check Engine Light; get it checked soon.
• Avoid driving aggressively until the issue is fixed.
Check your vehicle's warranty; sensor issues may be covered under emissions warranty.
The P3187 code has been associated with sensor failures and wiring issues in vehicles with advanced engine management systems.
Moderate – It's important to address this issue soon to avoid potential engine performance problems.
Driving with a faulty sensor can lead to increased emissions and may not comply with local emissions regulations.
• Engine at operating temperature
• Vehicle in a safe, stationary position
The Intake Air Temperature sensor is usually located in the air intake duct or near the air filter housing.
Q: Can I drive with a P3187 code?
A: It's possible to drive short distances, but it's best to fix the issue soon to avoid further engine problems.
Q: How can I prevent a P3187 code?
A: Regular maintenance and inspections can help prevent sensor issues.
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