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DTC P1273 FUEL PUMP
EC-1135
[YD (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
On Board Diagnosis Logic EBS011DX
DTC Confirmation Procedure EBS011DY
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. Start engine and warm it up to normal operating temperature.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Keep engine speed more than 2,000 rpm for at least 10 sec-
onds.
4. If 1st trip DTC is detected, go to EC-1137, "
Diagnostic Proce-
dure" .
WITH GST
Follow the procedure “WITH CONSULT-II” above.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1273 Fuel pump insufficient flow
ECM detects the abnormal pulse of fuel pres-
sure.
● Fuel pump
● Air mixed with fuel
● Lack of fuel
● Fuel rail pressure sensor
● Fuel transport pump operation
SEF817Y
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