DTC P0100:00 [PCM (SKYACTIV-X)]

Description	Mass air flow sensor circuit performance problem
Detection condition	Determination conditions	• Any one of the following conditions is met: ― The MAF sensor/IAT sensor No.1 determines an internal malfunction itself and the PCM receives error signals from the MAF sensor/IAT sensor No.1 for 5 s. ― The PCM receives a value other than the preset standard for the output value from the MAF sensor for 5 s.
	Preconditions	• Battery voltage: 8 V^1 ^1: Standard can be verified by displaying PIDs using M-MDS
	Drive cycle	• 1
	Self test type	• CMDTC self test, KOEO self test, KOER self test
	Sensor used	• MAF sensor/IAT sensor No.1
Fail-safe function	• Inhibits the boost system. • Stops the EGR control.
Vehicle status when dtcs are output	• Rough idling, poor acceleration, stalling
Possible cause	• MAF sensor/IAT sensor No.1 incorrect installation • MAF sensor/IAT sensor No.1 connector or terminals malfunction • PCM connector or terminals malfunction • Short to ground in any of the following MAF sensor/IAT sensor No.1 circuits. ― Power supply circuit ― Signal circuit • Open circuit in any of the following MAF sensor/IAT sensor No.1 circuits. ― Power supply circuit ― Signal circuit ― Ground circuit • Short to power supply in MAF sensor/IAT sensor No.1 signal circuit • Short circuit between any of the following MAF sensor/IAT sensor No.1 circuits. ― Power supply circuit ― Signal circuit ― Ground circuit • MAF sensor/IAT sensor No.1 malfunction • PCM malfunction

• The MAF sensor corrects the intake airflow amount inside the sensor based on the IAT sensor No.1 information. When there is an internal malfunction in IAT sensor No.1, the MAF sensor determines that there is a malfunction in itself and it sends a malfunction signal to the PCM. When the PCM receives a malfunction signal from the MAF sensor/IAT sensor No.1, the MAF sensor/IAT sensor No.1 determines an internal malfunction and stores a DTC.

In addition, when the PCM receives a value other than the preset standard for the output value from the MAF sensor continuously, the PCM determines that there is an internal malfunction in the MAF sensor/IAT sensor No.1 and stores a DTC.

PIDs	Reference
MAF	(See PID/DATA MONITOR TABLE [PCM (SKYACTIV-X)].)
IAT

Step	Inspection	Results	Action
1	PURPOSE: IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA • Is the DTC P0100:00 on freeze frame data?	Yes	Go to the next step.
1		No	Go to the troubleshooting procedure for DTC on freeze frame data. (See DTC TABLE [PCM (SKYACTIV-X)].)
2	PURPOSE: VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY • Verify related Service Bulletins, on-line repair information, or Service Information availability. • Is any related Information available?	Yes	Perform repair or diagnosis according to the available information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	PURPOSE: RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION • Record the freeze frame data/snapshot data. Note • Recording can be facilitated using the screen capture function of the PC.	—	Go to the next step.
4	PURPOSE: INSPECT FOR OTHER RELATED DTCs • Perform the DTC inspection for the PCM. (See DTC INSPECTION.) • Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-X)].)
4		No	Go to the next step.
5	PURPOSE: VERIFY MAF SENSOR/IAT SENSOR No.1 INPUT SIGNAL • Start the engine and idle it. • Access the following PIDs using the M-MDS: (See PID/DATA MONITOR INSPECTION.) ― MAF ― IAT • Is the PID value within specification?	Yes	Go to the next step.
5		No	Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.
6	PURPOSE: VERIFY CONNECTOR CONNECTIONS • Access the following PIDs using the M-MDS: (See PID/DATA MONITOR INSPECTION.) ― MAF ― IAT • Does the PID value fluctuate when the following connectors are shaken? ― MAF sensor/IAT sensor No.1 ― PCM	Yes	Inspect the related wiring harness and connector. • Repair or replace the malfunctioning part. Go to Troubleshooting Diagnostic Procedure to perform the repair completion verification.
6		No	Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.

• Repair completion verification

Step	Inspection	Results	Action
1	PURPOSE: VERIFY IF MAF SENSOR/IAT SENSOR No.1 IS INSTALLED CORRECTLY • Verify the MAF sensor/IAT sensor No.1 installation condition. (See MASS AIR FLOW (MAF) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO.1 REMOVAL/INSTALLATION [SKYACTIV-X 2.0].) • Is the installation condition normal?	Yes	Go to the next step.
1		No	Correctly install the MAF sensor/IAT sensor No.1 and perform the repair completion verification. (See MASS AIR FLOW (MAF) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO.1 REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
2	PURPOSE: INSPECT MAF SENSOR/IAT SENSOR No.1 CONNECTOR FOR MALFUNCTION • Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) • Are the connector and terminal normal?	Yes	Go to the next step.
2		No	Repair or replace the malfunctioning location and perform the repair completion verification.
3	PURPOSE: INSPECT PCM CONNECTOR FOR MALFUNCTION • Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) • Are the connector and terminal normal?	Yes	Go to the next step.
3		No	Repair or replace the malfunctioning location and perform the repair completion verification.
4	PURPOSE: INSPECT MAF SENSOR/IAT SENSOR No.1 POWER SUPPLY CIRCUIT AND SIGNAL CIRCUIT FOR SHORT TO GROUND • Inspect the applicable circuit for a short to ground. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning location and perform the repair completion verification.
5	PURPOSE: INSPECT MAF SENSOR/IAT SENSOR No.1 POWER SUPPLY CIRCUITS, SIGNAL CIRCUITS, AND GROUND CIRCUITS FOR OPEN CIRCUIT • Inspect the applicable circuit for open circuit. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to the next step.
5		No	Repair or replace the malfunctioning location and perform the repair completion verification.
6	PURPOSE: INSPECT MAF SENSOR/IAT SENSOR No.1 SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • Inspect the applicable circuit for a short to power supply. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to the next step.
6		No	Repair or replace the malfunctioning location and perform the repair completion verification.
7	PURPOSE: INSPECT MAF SENSOR/IAT SENSOR No.1 POWER SUPPLY CIRCUITS, SIGNAL CIRCUITS, AND GROUND CIRCUITS FOR SHORT CIRCUIT • Inspect the applicable circuits for a short circuit. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to the next step.
7		No	Repair or replace the malfunctioning location and perform the repair completion verification.
8	PURPOSE: INSPECT MAF SENSOR/IAT SENSOR No.1 FOR MALFUNCTION • Inspect the applicable part. (See MASS AIR FLOW (MAF) SENSOR INSPECTION [SKYACTIV-X 2.0].) (See INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION [SKYACTIV-X 2.0].) • Is the part normal?	Yes	Go to the next step.
8		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See MASS AIR FLOW (MAF) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO.1 REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
Repair completion verification 1	PURPOSE: VERIFY THAT VEHICLE IS REPAIRED • Install/connect the part removed/disconnected during the troubleshooting procedure. • Clear the DTC recorded in the memory. (See CLEARING DTC.) • Replicate the vehicle conditions at the time the DTC was detected using the following procedure. ― Perform the KOEO or KOER self test. (See DTC INSPECTION.) • Perform the DTC inspection for the PCM. (See DTC INSPECTION.) • Is the same Pending DTC present?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) If the CAN communication is normal, perform the diagnosis from Step 1. • If the malfunction recurs, replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)
Repair completion verification 1		No	Go to the next step.
Repair completion verification 2	PURPOSE: VERIFY IF OTHER DTCs DISPLAYED • Perform the DTC inspection. (See DTC INSPECTION.) • Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
Repair completion verification 2		No	DTC troubleshooting completed.

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