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 getting a weak signal from the sensor that measures how much air is going into the engine on one side of the engine. It's like trying to hear a whisper in a noisy room.
The Mass Air Flow (MAF) sensor measures the amount of air entering the engine. This code indicates that the signal from the MAF sensor on Bank 2 is lower than expected.
P1117 is triggered when the Engine Control Module (ECM) detects a lower than expected voltage signal from the Mass Air Flow sensor on Bank 2. This can affect the air-fuel mixture and engine performance.
• Check Engine Light is on
• Poor engine performance
• Rough idling or stalling
• Faulty Mass Air Flow sensor
• Wiring issues such as damaged wires or poor connections
• Clogged air filter or intake system
MAF Sensor: Mass Air Flow Sensor, measures the amount of air entering the engine.
ECM: Engine Control Module, the computer that controls the engine functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the MAF sensor and its wiring for damage.
• Check the air filter and intake system for obstructions.
• Replace the faulty MAF sensor.
• Repair or replace damaged wiring or connectors.
• Clean or replace the air filter.
• OBD-II scanner
• Multimeter
• Screwdriver set
$100 - $300
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regularly replace the air filter.
• Ensure the intake system is clean and free of debris.
• Inspect wiring and connectors periodically.
Sensor Issue
• Have the vehicle inspected by a professional mechanic.
• Avoid driving with this code for extended periods to prevent engine damage.
Check if the MAF sensor is covered under the vehicle's emissions warranty.
This code has been a common issue in vehicles with older MAF sensors due to wear and tear.
Moderate – Should be addressed soon to maintain engine performance.
Driving with a faulty MAF sensor can lead to increased emissions and may not pass emissions testing.
• Engine running at idle
• Vehicle at operating temperature
The MAF sensor is typically located between the air filter box and the throttle body.
Q: Can I drive with a P1117 code?
A: It's possible to drive short distances, but it's best to fix the issue soon to avoid engine performance problems.
Q: How do I know if my MAF sensor is bad?
A: Symptoms include rough idling, poor acceleration, and the Check Engine Light being on.
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.