Symptom List:
P1105-ATMOSPHERE PRESSURE SENSOR SRC HIGH EXCEEDED
P1105-ATMOSPHERE PRESSURE SENSOR SRC LOW EXCEEDED
P1610-REGULATOR LOWER REGULATOR LIMIT
P1610-REGULATOR UPPER REGULATOR LIMIT
P1615-MICROCONTROLLER GATE-ARRAY MONITORING
P1615-MICROCONTROLLER GATE-ARRAY WATCHDOG
P1615-MICROCONTROLLER PREPARE FUEL QUANTITY STOP
P1615-MICROCONTROLLER RECOVERY HAS OCCURRED
P1615-MICROCONTROLLER REDUNDANT OVERRUN MONITOR-
ING
P1620 - U-REF (2.5V)
P1680-EEPROM PLAUSIBILITY CHECKSUM ERROR FOR ADJ
(EGR)
P1680-EEPROM PLAUSIBILITY CHECKSUM ERROR IN CC212
P1680-EEPROM
PLAUSIBILITY
COMMUNICATION
WITH
EE-
PROM
P1680-EEPROM PLAUSIBILITY FUNC SWITCH WRONG OR MISS-
ING
P1680-EEPROM
PLAUSIBILITY
VER
NUMBER
NOT
CORRE-
SPONDING
P1680-EEPROM PLAUSIBILITY VIN CHECKSUM ERROR
Test Note:
All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P1105-ATMOSPHERE PRES-
SURE SENSOR SRC HIGH EXCEEDED.
POSSIBLE CAUSES
ENGINE CONTROL MODULE
INTERMITTENT CONDITION
TEST
ACTION
APPLICABILITY
1
NOTE: This DTC indicates an internal ECM problem.
Turn the ignition on.
With the DRB, erase ECM DTCs.
Perform several engine run cycles, turning the ignition off for at least 20 seconds
between each engine run cycle.
Monitor the DRB for ECM DTCs.
Did this DTC reset?
All
Yes
→
Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
No
→
Go To
2
87
DRIVEABILITY - DIESEL