Check fuel
pressure
Check pressure regulator,
and fuel pressurea, repair
or replace as necessary.
Check fuel
injector
fuel injector, repair or
replace as necessary.
4.5 Low idle speed
If engine idle speed is low referring to each actuator and sensor mentioned above, check
following components:
Engine coolant temperature sensor fault: check engine coolant temperature sensor and
wire, repair or replace as necessary.
Air intake temperature sensor fault: check air intake temperature sensor and wire,repair or
replace as necessary.
Step motor fault or stuck
Throttle position sensor fault: check engine throttle position sensor and wire, repair or
replace when necessary.
Fuel pressure and injector
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