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 thinks the air going into the engine is less than it should be. It's like when you're trying to breathe through a straw that's too small.
The code is triggered when the Mass Air Flow (MAF) sensor 'B' reading is lower than the minimum threshold set by the manufacturer.
The Mass Air Flow (MAF) sensor measures the amount of air entering the engine so the computer can calculate the correct amount of fuel to inject. Sensor 'B' is showing a reading that is below the expected minimum, which could affect engine performance.
• Check Engine Light is on
• Poor fuel economy
• Rough idle or stalling
• Faulty MAF sensor
• Air leaks in the intake system
• Clogged air filter
MAF: Mass Air Flow
OBD-II: On-Board Diagnostics, Second Generation
• Check for air leaks in the intake system
• Inspect the MAF sensor for dirt or damage
• Test the MAF sensor with a multimeter
• Replace or clean the MAF sensor
• Repair any air leaks in the intake system
• Replace the air filter if clogged
• OBD-II scanner
• Multimeter
• Screwdriver set
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly replace the air filter
• Inspect the intake system for leaks
• Clean the MAF sensor periodically
Sensor Issue
• Do not ignore the Check Engine Light
• Get the car diagnosed by a professional if unsure
• Regular maintenance can prevent this issue
Check with the vehicle manufacturer for sensor warranty coverage.
This code has been associated with sensor failures and intake system issues in various models over the years.
Moderate – Addressing this issue can prevent further engine performance problems.
Driving with a faulty MAF sensor can lead to increased emissions and may not comply with local regulations.
• Engine at operating temperature
• No other diagnostic trouble codes present
The MAF sensor is typically located between the air filter box and the throttle body in the engine bay.
Q: Can I drive with a P116B code?
A: It's not recommended to drive for long periods with this code, as it can lead to poor engine performance and increased fuel consumption.
Q: How can I clean the MAF sensor?
A: You can clean the MAF sensor using a specific MAF sensor cleaner spray. Ensure the sensor is completely dry before reinstalling.
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Fitment Required · Vehicle-fitment part
Relevant for airflow, fuel-trim, and intake-metering faults after confirming the sensor is actually at fault.
Airflow and fuel-trim codes can involve the mass air flow sensor after proper diagnosis.
Verify the sensor design and fitment for your exact vehicle.
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.