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 too much air going into the engine, more than it thinks is normal. It's like if you were blowing up a balloon and it was getting too much air, which might make it pop.
The engine control module (ECM) has detected that the air flow entering the engine has exceeded the maximum threshold for the Mass or Volume Air Flow sensor 'B'.
P116A is triggered when the Mass Air Flow (MAF) sensor 'B' reads a value higher than the expected maximum. This can indicate an issue with the sensor itself, a wiring problem, or an actual increase in air flow due to a mechanical fault.
• Check Engine Light is on
• Poor fuel economy
• Rough idle
• Faulty Mass Air Flow sensor
• Air intake system leak
• Wiring or connector issue
MAF: Mass Air Flow
ECM: Engine Control Module
• Inspect the MAF sensor and its wiring for damage.
• Check for air leaks in the intake system.
• Test the MAF sensor with a multimeter.
• Replace the faulty MAF sensor.
• Repair any leaks in the air intake system.
• Fix damaged wiring or connectors.
• OBD-II scanner
• Multimeter
• Screwdriver set
$100 - $300
Moderate
• Ford Focus
• Chevrolet Malibu
• Toyota Camry
• Regularly clean the air filter.
• Inspect the air intake system for leaks.
• Perform routine maintenance checks.
Sensor Issue
• Avoid driving aggressively until the issue is fixed.
• Monitor fuel economy for sudden changes.
Check with your vehicle manufacturer for warranty coverage on emissions-related components.
This code has been associated with MAF sensor issues across various makes and models, particularly in vehicles with high mileage.
Moderate – While the vehicle may still operate, ignoring this issue can lead to decreased performance and fuel efficiency.
Driving with a malfunctioning MAF sensor can lead to increased emissions, which may not comply with local environmental laws.
• Engine at operating temperature
• Vehicle at idle
The Mass Air Flow sensor is typically located between the air filter and the throttle body in the engine bay.
Q: Can I drive with a P116A code?
A: While you may be able to drive, it's not recommended as it can lead to poor performance and increased emissions.
Q: How do I reset the Check Engine Light after fixing the issue?
A: You can use an OBD-II scanner to clear the code and reset the light.
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Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
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Universal · Wire connectors and repair kit
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
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.