Section 08 ENGINE MANAGEMENT (4-TEC)
Subsection 03 (DIAGNOSTIC PROCEDURES)
RESPONSIBLE MODULE
FAULT
CODE
INFORMATION
CENTER
MPEM ECM
BEEPER
CODE
WARNING
LIGHT
MESSAGE
DISPLAYED
(info ctr)
FAULT
DETECTED
WHILE ENGINE
NOT RUNNING
FAULT
DETECTED
WHILE ENGINE
RUNNING
LIMP
HOME
MODE
NORMAL
OPERATION
RESUME
WHEN...
P0520 — —
Oil pressure
switch functional
problem
5 Off
CHK
ENG
Y Y 2500
Fault is
recovered
Possible cause:
Engine leak, oil pump failure, damaged sensor, damaged circuit wires, damaged connector or damaged ECM pins.
Service action:
Check resistance at 0 RPM and above 3500 RPM.
When blow-by pressure exceeds 40 kPa (6 PSI), the resistance is infinitely high.
P0544 — —
Exhaust gas
temperature
sensor functional
problem
5 Flash
CHK
ENG
N Y N
Fault is
recovered
Possible cause:
Damaged sensor, damaged circuit wires, damaged connector or damaged ECM output pins.
Service action:
Check for approximately 2280 to 2736 ohms at temperature of 19 to 21°C(66to70°F) between system circuits A-10 and A-26.
P0545 — —
Exhaust gas
temperature
sensor shorted
to ground
5 Flash
CHK
ENG
Y/N Y N
Fault is
recovered
Possible cause:
Damaged sensor, damaged circuit wires, damaged connector or damaged ECM output pins.
Service action:
Check for approximately 2280 to 2736 ohms at temperature of 19 to 21°C(66to70°F) between system circuits A-10 and A-26.
— —
Exhaust gas
temperature
sensor shorted
to 12 V
5 Flash
CHK
ENG
N Y N
Fault is
recovered
P0546
— —
Exhaust gas
temperature open
circuit
5 Flash
CHK
ENG
Y/N Y N
Fault is
recovered
Possible cause:
Damaged sensor, damaged circuit wires, damaged connector or damaged ECM output pins.
Service action:
Check for approximately 2280 to 2736 ohms at temperature of 19 to 21°C(66to70°F) between system circuits A-10 and A-26.
P0562 — —
Battery voltage
too low
15 Flash N/A N Y N
Fault is
recovered
Possible cause:
Battery failure, rectifier failure, damaged circuit wires, battery terminal connection, damaged AC generator or damaged connectors.
Service action:
Check fuses.
Check system circuits 1-25 to positive (+) battery terminal.
Check system circuits 1-24 to negative (-
) battery terminal.
smr2004-Complete Line Up 455
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