P0452

Test 1 - 2:

Test 3 - 6:

Test 7:

SYMPTOM
P0452-NVLD PRESSURE SWITCH SENSE CIRCUIT LOW

WHEN MONITORED
Immediately after engine start up.

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

POSSIBLE CAUSES
- Good trip equal to zero
- NVLD switch operation
- NVLD assembly
- (K52) EVAP purge SOL control circuit shorted to ground
- (K107) NVLD switch signal circuit shorted to ground
- EVAP purge solenoid leaks/stuck open
- PCM