Symptom:
P0452-NVLD PRESSURE SWITCH SENSE CIRCUIT LOW
When Monitored and Set Condition:
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
TEST ACTION APPLICABILITY
1 Ignition on, engine not running.
With the DRBIIIt, read DTCs and record the related Freeze Frame data.
Is the Good Trip Counter displayed and equal to zero?
All
Yes → Go To 2
No → Refer to the INTERMITTENT CONDITION symptom in the
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
2 Turn the ignition off.
Disconnect the EVAP Purge Solenoid harness connector.
Ignition on, engine not running.
Using a 12-volt test light, jumper across the EVAPPurge Solenoid harness connector.
With the DRBIIIt, actuate the EVAP Purge Solenoid.
Does the test light flash on and off?
All
Yes → Go To 3
No → Go To 7
169
DRIVEABILITY - NGC
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