P0845

Symptom:
P0845-2/4 HYDRAULIC PRESSURE TEST FAILURE

Test 1-4:

Test 5-8:

Test 9-12:

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 TCM momentarily turns on element pressure to the clutch circuits that do not 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
- RELATED DTC'S PRESENT
- TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN
- 2/4 PRESSURE SWITCH SENSE CIRCUIT OPEN
- 2/4 PRESSURE SWITCH SENSE CIRCUIT SHORT TO GROUND
- 2/4 PRESSURE SWITCH SENSE CIRCUIT SHORT TO VOLTAGE
- INTERNAL TRANSMISSION
- TRANSMISSION CONTROL MODULE
- INTERMITTENT WIRING AND CONNECTORS