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 in your car is not working properly. It's like a weather sensor that tells the car how much air is coming in, and it's not giving the right information.
The P11AF code indicates a problem with the sensor that measures air pressure in the engine, specifically on the second bank of the engine. The sensor is reporting a lower voltage than expected.
The Manifold Absolute Pressure (MAP) sensor measures the pressure inside the intake manifold. The Barometric Pressure (BARO) sensor measures the atmospheric pressure. The P11AF code is triggered when the Engine Control Module (ECM) detects a low voltage signal from the MAP/BARO sensor circuit on Bank 2, indicating a potential issue with the sensor, wiring, or connections.
• Check Engine Light (CEL) is on
• Poor engine performance
• Increased fuel consumption
• Faulty MAP/BARO sensor
• Wiring issues or poor connections
• ECM malfunction
MAP Sensor: Manifold Absolute Pressure Sensor, measures air pressure in the intake manifold.
BARO Sensor: Barometric Pressure Sensor, measures atmospheric pressure.
ECM: Engine Control Module, the computer that controls engine functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the MAP/BARO sensor and wiring for damage.
• Test the sensor voltage and compare it to specifications.
• Replace the faulty MAP/BARO sensor.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Screwdriver set
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect sensors and wiring.
• Keep the engine clean to prevent dirt buildup.
• Perform routine vehicle maintenance.
Sensor Issue
• Do not ignore the Check Engine Light.
• Get the vehicle inspected by a professional.
• Avoid driving aggressively until the issue is resolved.
Check with your vehicle manufacturer for warranty coverage on emissions-related components.
The P11AF code has been associated with vehicles that have high mileage or have been exposed to harsh environmental conditions.
Moderate – It is important to address this issue to avoid further engine performance problems.
Driving with a faulty sensor can lead to increased emissions, which might not comply with local environmental regulations.
• Engine at operating temperature
• Stable atmospheric conditions
The MAP/BARO sensor is typically located on the intake manifold or near the throttle body on Bank 2 of the engine.
Q: Can I drive my car with a P11AF code?
A: It's not recommended to drive for long periods with this code, as it can lead to poor performance and increased emissions.
Q: How can I reset the Check Engine Light?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is fixed, the light should stay off.
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