EDI DIAGNOSIS
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002
Page 5E-71
Display Terminology (Continued)
Related to
Scan Tool
Code
Displayed Extended Information
As Shown On Scan Tool
Explanation / Possible
Cause
P1220
PERSISTENT NEGATIVE
GOVERNOR DEVIATION (COLD)
When the engine is cold and
the monitored fuel quantity is
greater at a preset engine
speed than the real position of
the fuel quantity actuator.
Check wiring first. If
connections are OK, the pump
itself should be replaced.
P1220
PERSISTENT POSITIVE
GOVERNOR DEVIATION (COLD)
When the engine is cold and
the monitored fuel quantity is
less at a preset engine speed
than the real position of the
fuel quantity actuator. Check
wiring first. If connections are
OK, the pump itself should be
replaced.
P1225
START POSITION NOT ATTAINED
The fuel quantity sensor has
indicated to the ECM that the
fuel quantity actuator was not
at the set point value during
an ECM controlled start
position test. Check wiring
first. If connections are OK,
the pump itself should be
replaced.
P1225
STOP POSITION NOT ATTAINED
The fuel quantity sensor has
indicated to the ECM that the
fuel quantity actuator was not
at the set point value during
an ECM controlled stop
position test. Check wiring
first. If connections are OK,
the pump itself should be
replaced.
