Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is saying that the air going into the engine is colder than expected.
The intake air temperature sensor 2 on bank 1 is reading a temperature that is lower than the expected range.
The P11B4 code is triggered when the Powertrain Control Module (PCM) detects that the intake air temperature sensor 2 on bank 1 is reporting a temperature that is below the threshold set by the manufacturer. This could be due to a faulty sensor, wiring issues, or abnormal environmental conditions.
• Check Engine Light illuminated
• Poor fuel economy
• Engine performance issues
• Faulty intake air temperature sensor
• Wiring issues or poor connection
• Unusually cold ambient air temperature
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the code.
• Inspect the intake air temperature sensor and its wiring.
• Test the sensor with a multimeter for proper resistance.
• Replace the intake air temperature sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Clear the code and test drive to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Screwdriver set
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly check and maintain sensor connections.
• Ensure air intake system is free of debris.
• Perform routine vehicle diagnostics.
Sensor Issue
• Have the vehicle inspected by a professional if unsure.
• Avoid driving in extreme cold conditions if possible.
Check vehicle warranty for coverage on sensors.
This code has been associated with faulty sensors and wiring issues in vehicles with high mileage.
Moderate – Address the issue soon to avoid potential engine performance problems.
Driving with a faulty sensor may lead to increased emissions and reduced engine efficiency.
• Engine at normal operating temperature
• Ambient temperature within normal range
The intake air temperature sensor is typically located near the air filter housing or intake manifold.
Q: Can I drive with a P11B4 code?
A: It's possible to drive, but it's best to address the issue to avoid potential engine performance problems.
Q: How do I reset the check engine light after fixing the issue?
A: Use an OBD-II scanner to clear the code after repairs are complete.
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