Symptom:
P0845-2/4 HYDRAULIC PRESSURE TEST FAILURE
When Monitored and Set Condition:
P0845-2/4 HYDRAULIC PRESSURE TEST FAILURE
When Monitored: In any forward gear with engine speed above 1000 RPM, shortly after
a shift and every minute thereafter.
Set Condition: After a shift into a forward gear, with engine speed greater than 1000
RPM, the PCM momentarily turns on element pressure to the clutch circuits that don’t
have pressure to identify the correct pressure switch closes. If the pressure switch does not
close 2 times the DTC sets.
POSSIBLE CAUSES
LOSS OF PRIME P0944 PRESENT
TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN
2/4 PRESSURE SWITCH SENSE CIRCUIT OPEN
2/4 PRESSURE SWITCH CIRCUIT SHORT TO GROUND
INTERNAL TRANSMISSION
2/4 PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
TRANSMISSION SOLENOID/TRS ASSEMBLY
POWERTRAIN CONTROL MODULE
INTERMITTENT WIRING AND CONNECTORS
106
TRANSMISSION - NGC
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