P0104
Mass Air Flow (MAF) Circuit Intermittent
2010-2021 Fiat Uno 1.0L I4 Flex Fire Evo
Moderate SeverityPowertrainGeneric (SAE)
Description
The MAF sensor signal is intermittent, showing erratic readings.
Symptoms
- Check Engine Light (intermittent)
- Intermittent stalling
- Surging
- Poor driveability
Common Causes
- Loose MAF connector
- Damaged wiring
- Intermittent sensor failure
- Vibration-induced disconnect
Diagnostic Steps
- Wiggle test on MAF connector
- Inspect wiring for chafing
- Monitor MAF signal for dropouts
- Check connector pins
Repair Notes
Repair connector or wiring. Replace sensor if internal failure.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P0104 on Other Vehicles
Fiat 124 Spider
2017-2020 1.4L I4 Turbo
Fiat 126p Maluch
1973-2000 0.65L I2 Air-Cooled
Fiat 126p Maluch
1987-2000 0.7L I2 Air-Cooled
Fiat 500
2012-2019 1.4L I4
Fiat 500 Abarth
2012-2019 1.4L I4 Turbo
Fiat 500 BR
2011-2020 1.4L I4 Flex Fire Evo
Fiat 500 PL
2007-2025 1.0L I3 Hybrid FireFly 70
Fiat 500 PL
2007-2025 1.2L I4 Fire 69
Common Questions
What does code P0104 mean on a 2010-2021 Fiat Uno?
P0104 stands for "Mass Air Flow (MAF) Circuit Intermittent". The MAF sensor signal is intermittent, showing erratic readings.
What are the symptoms of P0104 on a Fiat Uno?
Common symptoms of P0104 include: Check Engine Light (intermittent), Intermittent stalling, Surging, Poor driveability.
What causes P0104 on a 2010-2021 Fiat Uno?
Common causes of P0104 include: Loose MAF connector, Damaged wiring, Intermittent sensor failure, Vibration-induced disconnect.