P0103: Mass or Volume Air Flow Circuit High Input
Can you still drive? Driving is possible but fuel economy will suffer and the engine may run rough. Have it checked within a few days.
What Does P0103 Mean?
Code P0103 is set when the ECU detects that the voltage signal from the mass airflow sensor is higher than the expected range. This typically means the sensor is reporting more airflow than is physically possible, often due to a sensor fault or wiring issue. The engine may run rich as a result.
Need to read your codes?
An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
Browse OBD-II Scanners on AmazonCommon Causes
- Faulty MAF sensor
- Short circuit in MAF sensor wiring
- Contaminated MAF sensor element
- Intake air leak after the MAF sensor
Symptoms
- Check engine light on
- Rich running condition
- Black exhaust smoke
- Reduced fuel economy
- Rough idle
Diagnostic Steps
- 1Read and document freeze frame data
- 2Inspect MAF sensor connector and wiring for damage or corrosion
- 3Check MAF sensor voltage at idle and compare to specifications
- 4Look for intake air leaks between the MAF sensor and throttle body
- 5Clean or replace the MAF sensor as needed
Recommended Parts & Tools
MAF sensor cleaner
electrical connector cleaner
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $50 - $400 |
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Chat with AI About P0103Commonly Affected Vehicles
Related Recalls
6 Active Recalls — 2026 Ford Explorer
The following NHTSA safety recalls have been issued for this vehicle. Contact your dealer to check if your vehicle is affected.
VISIBILITY:WINDSHIELD
Ford Motor Company (Ford) is recalling certain 2025-2026 Lincoln Corsair, Lincoln Aviator, and Explorer vehicles. The windshield glass may have visible air bubbles, which can obscure the driver's visibility. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 205, "Glazing Materials."
Remedy: Dealers will inspect and replace the windshield as necessary, free of charge. Owner notification letters were mailed November 6, 2025. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 25C60. Vehicle Identification Numbers (VINs) involved in this recall become searchable on NHTSA.gov beginning October 27, 2025.
ENGINE
Ford Motor Company (Ford) is recalling certain 2026 Explorer, Mustang, Lincoln Corsair, and 2025 Maverick vehicles. The cylinder head may have been improperly manufactured, which can cause the ball plugs to fail, resulting in an oil leak.
Remedy: Dealers will replace the cylinder head assembly, free of charge. All affected vehicles are still within dealership inventory and therefore no owner notification letters will be mailed. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 25SD3. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on November 24, 2025.
TRAILER HITCHES
Ford Motor Company (Ford) is recalling certain 2024-2026 Explorer and 2024-2026 Lincoln Aviator vehicles. The trailer hitch assembly bolts may be loose.
Remedy: Dealers will inspect and tighten the trailer hitch bolts, or replace them as necessary, free of charge. Owner notification letters were mailed October 29, 2025. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 25SA3. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on October 15, 2025.
VISIBILITY:WINDSHIELD
Ford Motor Company (Ford) is recalling certain 2026 Explorer vehicles. During manufacturing, the windshield may not have been properly bonded to the vehicle, allowing it to detach in a crash. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 212, "Windshield Mounting."
Remedy: Dealers will remove and replace the windshield, free charge. Owner notification letters were mailed January 30, 2026. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 26C02. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on January 22, 2026.
EXTERIOR LIGHTING:HEADLIGHTS
Ford Motor Company (Ford) is recalling certain 2025-2026 Explorer vehicles. The Dynamic Bending Light (DBL) system software may cause the passenger-side headlight to turn in the wrong direction when driving through curves in the road. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, " Lamps, Reflective Devices, and Associated Equipment."
Remedy: The headlight control module software will be updated by a dealer, or through an over-the-air (OTA) update, free of charge. Owner notification letters are expected to be mailed March 23, 2026. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 26C12. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on March 5, 2026.
+ 1 more recall. Visit NHTSA.gov for full details.
Data provided by the National Highway Traffic Safety Administration (NHTSA).
Frequently Asked Questions
What causes P0103?
P0103 is most commonly caused by a faulty MAF sensor, damaged wiring, or a short circuit that sends a higher-than-normal voltage signal to the ECU.
Is P0103 expensive to fix?
Not usually. A new MAF sensor typically costs $50 to $300 depending on the vehicle, and cleaning the sensor may resolve the issue for under $15.
Community Fix Reports
Community reports are user-submitted and not verified by Auto AI Buddy. Results may vary.
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