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DTC P0401 EGR FUNCTION
EC-1225
[YD (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
CONSULT-II Reference Value in Data Monitor Mode BBS0021F
Specification data are reference values.
On Board Diagnosis Logic BBS0021G
DTC Confirmation Procedure BBS0021H
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
WITH CONSULT-II
1. Turn ignition switch ON and select “DATA MONITOR” mode with
CONSULT-II.
2. Start engine.
3. Maintain the following conditions for at least 40 consecutive sec-
onds.
4. If 1st trip DTC is detected, go to EC-1227, "
Diagnostic Proce-
dure" .
WITH GST
Follow the procedure “WITH CONSULT-II” above.
MONITOR ITEM CONDITION SPECIFICATION
EGR VOL CON/V
● Engine: After warming up
● Air conditioner switch: OFF
● Shift lever: Neutral position
● No load
After 1 minute at idle More than 10 steps
Revving engine from idle to 3,600
rpm
0 step
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0401
0401
Exhaust gas recirculation flow
insufficient detected
The exhaust gas recirculation flow is
insufficient.
● Harness or connectors
(The EGR volume control valve
circuit is open or shorted.)
● EGR volume control valve stuck
closed
● EGR passage clogged
PBIB2156E
COOLAN TEMP/S 50 - 89 °C (122 - 192 °F)
Voltage between ECM terminal 55 (Intake air tem-
perature sensor) and ground
1.7 - 2.6V
PBIB2017E
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