EN(H4SO)(diag)-179
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
23
GROUP OF #1 AND #3 CYLINDERS.
Are there any faults in #1 and
#3 cylinders?
Repair or replace
faulty parts.
NOTE:
Check the follow-
ing items.
• Spark plug
• Fuel injector
• Compression ra-
tio
• Skipping timing
belt teeth
Go to DTC P0171.
<Ref. to
EN(H4SO)(diag)-
155, DTC P0171
SYSTEM TOO
LEAN (BANK 1),
Diagnostic Proce-
dure with Diagnos-
tic Trouble Code
(DTC).>
24
GROUP OF #2 AND #4 CYLINDERS.
Are there any faults in #2 and
#4 cylinders?
Repair or replace
faulty parts.
NOTE:
Check the follow-
ing items.
• Spark plug
• Fuel injector
• Compression ra-
tio
• Skipping timing
belt teeth
Go to DTC P0171.
<Ref. to
EN(H4SO)(diag)-
155, DTC P0171
SYSTEM TOO
LEAN (BANK 1),
Diagnostic Proce-
dure with Diagnos-
tic Trouble Code
(DTC).>
25
CYLINDER AT RANDOM.
Is the engine idle rough?
Go to DTC P0171.
<Ref. to
EN(H4SO)(diag)-
155, DTC P0171
SYSTEM TOO
LEAN (BANK 1),
Diagnostic Proce-
dure with Diagnos-
tic Trouble Code
(DTC).>
Repair or replace
faulty parts.
NOTE:
Check the follow-
ing items.
• Spark plug
• Fuel injector
• Compression ra-
tio
Step
Check
Yes
No