P0100 obd2 code description and mass sensor basics


Shown here is P0100 obd2 code and it's meaning. To fix this code, one must understand the operation of the air mass sensor and air volume passing thru the mass sensor. Please read the list of obd2 codes shown below.

P0100 Engine Mass Air Flow ckt

mass sensor

This code refers to the volume of air flow passing thru the mass sensor wiring elements. The code will also occur if the sensor wiring connections is removed more than 3 seconds with key on. Always reset the code when checking this code and here are some basic tests if the code re-appears:

check the air filter, if dirty it can pollute the mass sensor wire elements
clean the mass sensor elements with a brake spray and let it dry
check the wiring circuits for connections making sure the pins/wires are not loose or cut. Use ATS diagnostic tree to check the wiring and ground connections.

Quick MAF (mass air) sensor TIP:

A MAF-equipped engine is easier to fix but their are complications. All MAFs have speed-density limits when the engine is off the range of the MAF. All these limits or deviations can be called as systematic errors or random errors . Some systematic errors is compensated by means of of calibration strategy. When done, always check for the source of vacuum leak. Any intake vacuum leak after the MAF sensor can cause unmetered air to corrupt the MAF readings which can cause a false computer signal. In essence, the sensor is easy to replace and remember: MAF (mass air sensor) sensors are critical to the engine operating properly especially during acceleration.



CODE     Meaning or Description

P0097     Engine Intake Air Temp Sensor ckt
P0098     Engine Intake Air Temp Sensor ckt
P0099     Engine Intake Air Temp Sensor ckt
P009A     Engine Intake Air Temp-Ambient Air Temperature variation
P009B     Engine Fuel Press Relief Cntl ckt
P009C     Engine Fuel Press Relief Cntl ckt
P009D     Engine Fuel Press Relief Cntl ckt
P009E     Engine Fuel Press Relief Cntl ckt
P009F     Engine Fuel Pressure Relief Cntl ckt
P00A0     Engine Air Cooler Temp Sensor
P00A1     Engine Air Cooler Temp Sensor
P00A2     Engine Air Cooler Temp Sensor
P00A3     Engine Air Cooler Temp Sensor
P00A4     Engine Air Cooler Temp Sensor
P00A5     Engine Air Temp Sensor ckt
P00A6     Engine Air Temp Sensor ckt
P00A7     Engine Air Temp Sensor ckt
P00A8     Engine Air Temp Sensor ckt
P00A9     Engine Air Temp Sensor ckt
P00AA     Engine Air Temp Sensor ckt
P00AB     Engine Air Temp Sensor ckt
P00AC     Engine Air Temp Sensor ckt
P00AD     Engine Air Temp Sensor ckt
P00AE     Engine Air Temp Sensor ckt
P00AF     Engine Turbo-Supercharger Boost Cntl
P00B0     Engine Turbo-Supercharger Boost Cntl
P00B1     Rad Coolant Temp Sensor ckt
P00B2     Rad coolant Temp Sensor ckt
P00B3     Rad Coolant Temp Sensor ckt
P00B4     Rad Coolant Temp Sensor ckt
P00B5     Rad Coolant Temp Sensor ckt
P00B6     Rad Coolant Temp-Engine Coolant Temp variation
P00B7     Coolant Flow Performance
P00B8     Engine MAP-Mass Air Flow variation (Bank 2)
P0100     Engine Mass Air Flow ckt
P0101     Engine Mass Air Flow ckt
P0102     Engine Mass Air Flow ckt
P0103     Engine Mass Air Flow ckt
P0104     Engine Mass Air Flow ckt
P0105     Engine Manifold Absolute Press ckt
P0106     Engine Manifold Absolute Press Sensor
P0107     Engine Manifold Absolute Press sensor
P0108     Engine Manifold Absolute Press sensor
P0109     Engine Manifold Absolute Press sensor
P010A     Engine Mass Air Flow
P010B     Engine Mass Air Flow
P010B     No Comm With EGR cntl mod
P010C     Engine Mass Air Flow
P010D     Engine Mass Air Flow

Back to more OBD2 code listings

Please Watch ATS Latest Videos:

Buying a Used Car with Check Engine Light
Car Battery Repair
Using Cheap Auto Scanner
Buying An Engine Code Reader Under $200
1999 Pontiac Transport No Start
Chevy Venture Scanner Won't Work
Prevent Damaged Spark Plug Hole
Troubleshooting Car Audio Amplifier
1996 Dodge Misfire Fix