DTC P0400:00 [MZR-CD 2.2]

id0102f3155100

DTC P0400:00

EGR valve problem

DETECTION CONDITION

•  The PCM monitors the EGR valve driving duty value after the engine starts. If the EGR valve driving duty value is more than 80 % for 70 s, the PCM determines that the EGR valve has a malfunction.

MONITORING CONDITIONS

―  Battery voltage: 8—20 V

Diagnostic support note

•  The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.

•  PENDING CODE is available if the PCM detects the above malfunction condition during first drive cycle.

•  FREEZE FRAME DATA (Mode 2)/Snapshot data is available.

•  The DTC is stored in the PCM memory.

POSSIBLE CAUSE

•  EGR valve malfunction

•  EGR valve position sensor malfunction

•  PCM malfunction

DTC P0400:00	EGR valve problem
DETECTION CONDITION	• The PCM monitors the EGR valve driving duty value after the engine starts. If the EGR valve driving duty value is more than 80 % for 70 s, the PCM determines that the EGR valve has a malfunction. MONITORING CONDITIONS ― Battery voltage: 8—20 V Diagnostic support note • The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM. • PENDING CODE is available if the PCM detects the above malfunction condition during first drive cycle. • FREEZE FRAME DATA (Mode 2)/Snapshot data is available. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE	• EGR valve malfunction • EGR valve position sensor malfunction • PCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA (MODE 2) • Perform the Freeze Frame PID Data Access Procedure. (See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].) • Is the DTC P0400:00 on FREEZE FRAME DATA (Mode 2)?	Yes	Go to the next step.
1		No	Go to the troubleshooting procedure for DTC on FREEZE FRAME DATA (Mode 2). (See DTC TABLE [MZR-CD 2.2].)
2	VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA (Mode 2)/snapshot data been recorded?	Yes	Go to the next step.
2		No	Record the FREEZE FRAME DATA (Mode 2)/snapshot data on the repair order, then go to the next step.
3	VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
3		No	Go to the next step.
4	INSPECT EGR VALVE OPERATION • Perform the EGR Valve Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR-CD 2.2].) • Does the EGR valve operate properly?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning part according to the inspection results, then go to Step 6.
5	INSPECT EGR VALVE POSITION SENSOR • Access the EGRP PID with % and V mode. (See ON-BOARD DIAGNOSTIC TEST [MZR-CD 2.2].) • Move the EGR valve using the EGRP PID % active command mode function. • Monitor the EGRP PID V mode. • Does the EGRP PID V mode moves according to the EGR valve actuate value?	Yes	Go to the next step.
5		No	Inspect the EGR valve position sensor. (See EGR VALVE POSITION SENSOR INSPECTION [MZR-CD 2.2].) • If there is any malfunction: ― Replace the EGR valve, then go to the next step. (See EGR VALVE REMOVAL/INSTALLATION [MZR-CD 2.2].) • If there is no malfunction: ― Go to the next step.
6	VERIFY DTC TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [MZR-CD 2.2].) • Start the engine. • Perform the KOER self test. (See KOEO/KOER SELF TEST [MZR-CD 2.2].) • Is the PENDING CODE for this DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [MZR-CD 2.2].)
6		No	Go to the next step.
7	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [MZR-CD 2.2].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZR-CD 2.2].)
7		No	DTC troubleshooting completed.