DTC P00BC:00 [MZ-CD 1.6 (Y6) (EURO5 emission level)]

DTC P00BC:00	Mass air flow (MAF) sensor range/performance - airflow too low
DETECTION CONDITION	• The PCM monitors the mass airflow amount and compares the calculated values. If the difference between the calculated value and the actual measured value decreases below the threshold value, the PCM determines that there is a malfunction in the MAF sensor.
POSSIBLE CAUSE	• MAF sensor malfunction • Air restriction or leakage at intake-air system • PCM malfunction

DTC P00BC:00

Mass air flow (MAF) sensor range/performance - airflow too low

DETECTION CONDITION

• The PCM monitors the mass airflow amount and compares the calculated values. If the difference between the calculated value and the actual measured value decreases below the threshold value, the PCM determines that there is a malfunction in the MAF sensor.

POSSIBLE CAUSE

• MAF sensor malfunction

• Air restriction or leakage at intake-air system

• PCM malfunction

STEP	INSPECTION	ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
No	Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2	VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related service repair information availability. • Is any related repair information available?	Yes	Perform repair or diagnosis according to the available repair information. • If the vehicle is not repaired, go to the next step.
No	Go to the next step.
3	VERIFY RELATED PENDING CODE AND/OR DTC • Switch the ignition to ON (engine off). • Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure. (See ON-BOARD DIAGNOSTIC TEST [MZ-CD 1.6 (Y6) (EURO5 emission level)].) • Is the other PENDING CODE/DTC also present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZ-CD 1.6 (Y6) (EURO5 emission level)].)
No	Go to the next step.
4	INSPECT AIR RESTRICTION OR LEAKAGE AT INTAKE-AIR SYSTEM • Inspect the intake-air system for air restriction or leakage. • Is there any air restriction or leakage?	Yes	Repair or replace malfunctioning part, then go to Step 6.
No	Go to the next step.
5	INSPECT MAF SENSOR • Inspect the MAF sensor. (See MASS AIR FLOW (MAF) SENSOR INSPECTION [MZ-CD 1.6 (Y6) (EURO5 emission level)].) • Is there any malfunction?	Yes	Replace the MAF/IAT sensor, then go to the next step. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6)].)
No	Go to the next step.
6	VERIFY THAT DTC P00BC:00 TROUBLESHOOTING IS COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. • Run the vehicle under the FREEZE FRAME DATA stored condition. • Is the same DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6) (EURO5 emission level)].) Go to the next step.
No	Go to the next step.
7	VERIFY AFTER REPAIR PROCEDURE • Perform the after repair procedure. (See AFTER REPAIR PROCEDURE [MZ-CD 1.6 (Y6) (EURO5 emission level)].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZ-CD 1.6 (Y6) (EURO5 emission level)].)
No	DTC troubleshooting completed.

STEP

INSPECTION

ACTION

VERIFY FREEZE FRAME DATA HAS BEEN RECORDED

• Has the FREEZE FRAME DATA been recorded?

Yes

Go to the next step.

Record the FREEZE FRAME DATA on the repair order, then go to the next step.

VERIFY RELATED REPAIR INFORMATION AVAILABILITY

• Verify related service repair information availability.

• Is any related repair information available?

Yes

Perform repair or diagnosis according to the available repair information.

• If the vehicle is not repaired, go to the next step.

Go to the next step.

VERIFY RELATED PENDING CODE AND/OR DTC

• Switch the ignition to ON (engine off).

• Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.

(See ON-BOARD DIAGNOSTIC TEST [MZ-CD 1.6 (Y6) (EURO5 emission level)].)

• Is the other PENDING CODE/DTC also present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [MZ-CD 1.6 (Y6) (EURO5 emission level)].)

Go to the next step.

INSPECT AIR RESTRICTION OR LEAKAGE AT INTAKE-AIR SYSTEM

• Inspect the intake-air system for air restriction or leakage.

• Is there any air restriction or leakage?

Yes

Repair or replace malfunctioning part, then go to Step 6.

Go to the next step.

INSPECT MAF SENSOR

• Inspect the MAF sensor.

(See MASS AIR FLOW (MAF) SENSOR INSPECTION [MZ-CD 1.6 (Y6) (EURO5 emission level)].)

• Is there any malfunction?

Yes

Replace the MAF/IAT sensor, then go to the next step.

(See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6)].)

Go to the next step.

VERIFY THAT DTC P00BC:00 TROUBLESHOOTING IS COMPLETED

• Make sure to reconnect all disconnected connectors.

• Clear the DTC from the PCM memory using the M-MDS.

• Run the vehicle under the FREEZE FRAME DATA stored condition.

• Is the same DTC present?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the PCM.

(See PCM REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6) (EURO5 emission level)].)

Go to the next step.

VERIFY AFTER REPAIR PROCEDURE

• Perform the after repair procedure.

(See AFTER REPAIR PROCEDURE [MZ-CD 1.6 (Y6) (EURO5 emission level)].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [MZ-CD 1.6 (Y6) (EURO5 emission level)].)

DTC troubleshooting completed.