Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car has a sensor that measures how much air is going into the engine. This helps the engine run smoothly. Right now, this sensor is not working properly all the time, which can cause the car to run poorly.
The Mass Air Flow (MAF) sensor measures the amount of air entering the engine. Code P0104 indicates that the signal from this sensor is not consistent.
P0104 is triggered when the Powertrain Control Module (PCM) detects an intermittent signal from the Mass Air Flow (MAF) sensor. This sensor is crucial for calculating the correct air-fuel ratio needed for optimal engine performance.
• Check Engine Light is on
• Engine may run rough or stall
• Poor fuel economy
• Faulty MAF sensor
• Loose or corroded electrical connections
• Damaged wiring in the MAF sensor circuit
MAF Sensor: Mass Air Flow Sensor, measures the amount of air entering the engine.
PCM: Powertrain Control Module, the computer that controls the engine and transmission.
• Use an OBD-II scanner to confirm the code
• Inspect the MAF sensor and its wiring for damage
• Check for loose or corroded electrical connections
• Clean the MAF sensor
• Repair or replace damaged wiring
• Replace the MAF sensor if faulty
• OBD-II scanner
• Multimeter
• Screwdriver set
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly clean the MAF sensor
• Ensure air filters are replaced as per maintenance schedule
• Check wiring and connections periodically
Sensor Issue
• Avoid driving with this issue for extended periods
• Have a professional inspect the vehicle if unsure
• Monitor fuel economy for any changes
Check with your vehicle manufacturer for warranty coverage on emissions-related components.
P0104 has been a common issue in vehicles with MAF sensors since the introduction of OBD-II systems, often due to sensor contamination or electrical issues.
Moderate – While the vehicle may still be drivable, it can lead to poor performance and increased emissions.
Driving with a malfunctioning MAF sensor may increase emissions and could be illegal in some areas due to environmental regulations.
• Engine at operating temperature
• Vehicle idling or under load
The MAF sensor is typically located between the air filter and the throttle body in the engine bay.
Q: Can I drive my car with a P0104 code?
A: It's possible to drive, but it may lead to poor performance and increased emissions. It's best to fix it soon.
Q: How do I clean a MAF sensor?
A: Use a MAF sensor cleaner spray and follow the instructions carefully. Do not touch the sensor wires.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
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.
View on Amazon
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.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.
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.