DTC P0400:00 [MZR-CD 2.2]

id0102f3155100

DTC P0400:00

EGR valve malfunction

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 sec., the PCM determines that the EGR valve is malfunction.

Monitoring condition

•  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 the first drive cycle.

•  FREEZE FRAME DATA (mode2) and snapshot data are available.

•  DTCs are stored in the PCM memory.

POSSIBLE CAUSE

•  EGR valve malfunction (stuck)

•  EGR valve position sensor malfunction

•  PCM malfunction

DTC P0400:00	EGR valve malfunction
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 sec., the PCM determines that the EGR valve is malfunction. Monitoring condition • 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 the first drive cycle. • FREEZE FRAME DATA (mode2) and snapshot data are available. • DTCs are stored in the PCM memory.
POSSIBLE CAUSE	• EGR valve malfunction (stuck) • EGR valve position sensor malfunction • PCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA (MODE2) OR SNAPSHOT DATA HAVE BEEN RECORDED • Have FREEZE FRAME DATA (mode2) or snapshot data been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA (mode2) and snapshot data on repair order, then go to the next step.
2	VERIFY RELATED SERVICE INFORMATION • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to available Service Information. • If vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA (MODE2) • Is DTC P0400:00 on FREEZE FRAME DATA (mode2)?	Yes	Go to the next step.
3		No	Go to troubleshooting procedures for DTC in FREEZE FRAME DATA (mode2). (See DTC TABLE [MZR-CD 2.2].)
4	INSPECT EGR VALVE OPERATION • Perform the EGR Valve Operation Inspection. (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [MZR-CD 2.2].) • Does EGR valve operate properly?	Yes	Go to the next step.
4		No	Repair or replace malfunctioning part, according to inspection results. Then go to Step 6.
5	INSPECT EGR VALVE POSITION SENSOR • Access EGRP PID with % and V mode. • Switch the ignition to ON (engine off). • Move the EGR valve using EGRP PID % active command mode function. • Monitor EGRP PID V mode. • Does EGRP PID V mode moves according to 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 the EGR valve position sensor normal, go to the next step. • If the EGR valve position sensor not normal, replace the EGR valve. (See EGR VALVE REMOVAL/INSTALLATION [MZR-CD 2.2].) Then go to the next step.
6	VERIFY TROUBLESHOOTING OF DTC P0400:00 COMPLETED • Make sure to reconnect all disconnected connectors. • Switch the ignition to ON (engine off). • Clear the DTC from the PCM memory using the M-MDS. • Start the engine. • 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].) • Is any DTC present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZR-CD 2.2].)
7		No	Troubleshooting completed.