P0452

Test 1 - Test 2:

Test 3 - Test 7:

Test 8:

SYMPTOM
P0452-NVLD PRESSURE SWITCH SENSE CIRCUIT LOW

WHEN MONITORED
Immediately after engine start up.

SET CONDITION
The PCM activates the NVLD Solenoid. If PCM does not see NVLD switch open, an error is detected. One Trip Fault.

POSSIBLE CAUSES
- Good trip equal to zero
- Vehicle history and service bulletin investigation
- EVAP purge solenoid leaks/stuck open
- NVLD switch operation
- NVLD assembly
- (K107) NVLD switch signal circuit shorted to ground
- PCM