DTC Advanced Diagnostics: P0100 (1.5L Engine)
DTC P0100: Mass Airflow (MAF) Sensor Circuit Malfunction
General Description
The mass airflow (MAF) sensor is attached to the intake air passage, and it measures the amount of intake airflow. The MAF sensor is a chip type airflow meter. The airflow cools the electrically heated chip that is mounted in the air passage. The powertrain control module (PCM) determines the amount of intake airflow by detecting the frequency. If the MAF sensor input frequency is a set value, the PCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | 2.0 seconds or more |
| DTC Type | One drive cycle, MIL on |
Enable Conditions
| Condition | |
|---|---|
| Vehicle | ON mode |
Malfunction Threshold
The MAF sensor input frequency [MAF Sensor] is less than 488 Hz for at least 2.0 seconds.
[ ]: HDS Parameter
Possible Cause
The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
- MAF sensor FGP line short to ground
- MAF sensor FGP line open
- MAF sensor FGP line short to power
- MAF sensor VCC2 line open
- MAF sensor VCC2 line short to ground
- MAF sensor SG2 line open
- MAF sensor failure
- PCM internal circuit failure
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, the freeze data, and the on-board snapshot are stored in the PCM memory.
Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, the freeze data, and the on-board snapshot can be cleared with the scan tool clear command.