What does engine code P0103 mean?

What does engine code P0103 mean?

Diagnostic trouble code (DTC) P0103 stands for “Mass or Volume Air Flow “A” Circuit High.” As mentioned above, the MAF sensor is responsible for measuring the amount of air entering your vehicle’s engine. Most MAF sensors contain a wire (or in some cases, a grid) that’s exposed to the intake airflow.

What causes high MAF voltage?

Possible Causes: Intake air leaks. Dirty mass air flow sensor. Dirty mass air filter. Mass air flow sensor harness is open or shorted The MAF Sensor is unplugged or the wiring is damaged.

What would be the conditions for the running DTC P0103 mass air flow sensor circuit high frequency?

This diagnostic tests for too high an airflow rate. This DTC sets when the PCM detects that the MAF sensor frequency is above a predetermined value. The engine speed is greater than 300 RPM. The system voltage is greater than 8.0 volts.

What part is having trouble in P0103?

P0103 is the code for a problem with the Mass Airflow (MAF) Sensor having a high voltage output to the Engine Control Unit (ECU).

How do you diagnose a bad mass air flow sensor?

Symptoms of a Faulty Mass Air Flow Sensor

  1. The engine is very hard to start or turn over.
  2. The engine stalls shortly after starting.
  3. The engine hesitates or drags while under load or idle.
  4. Hesitation and jerking during acceleration.
  5. The engine hiccups.
  6. Excessively rich or lean idling.

What happens when MAF sensor is unplugged?

Q: Car runs with the mass airflow sensor unplugged. If you plug it in it will die if the car is running. If you unplug the mass air flow sensor the car will start. If you try to plug it in while it’s running the car will die.

What does mass or volume air flow circuit low input mean?

The MAF Sensor has low voltage output problems which may have several causes. The source of the problem is the sensor range voltage is lower than normal or required by the ECU to function properly. The most obvious problem is restricted airflow from the air cleaner to the MAF sensor which can be a clogged air filter.

What problems does a bad mass air flow sensor cause?

A bad MAF sensor can cause your vehicle to experience poor drivability issues such as engine stalling, jerking or hesitation during acceleration. This could happen while speeding up on the highway on-ramp or cruising down a city street. These issues can create dangerous situations causing accidents and injury.

Why does my truck run better when I unplug the MAF sensor?

If the car is running better with the MAF sensor unplugged, it means that the sensor is sending inaccurate readings and needs to be either cleaned or replaced.

Where is the mass air flow sensor?

The mass air flow sensor (MAF) is a key component of the electronic fuel injection system in a car. It is located between the air filter and the engine’s intake manifold. In some cars, the intake air temperature (IAT) sensor is built into the mass air flow sensor.

  • October 9, 2022