Hello, I own a 2003 Dodge Intrepid and my check engine light is on. The diagnostic trouble code displayed is P0452, which indicates 'Evaporative Emission System - Negative Voltage Level (NVLD) Pressure Switch Stuck Closed'. Can someone please confirm the exact location of the NVLD pressure sensor switch in this model? I'd also appreciate any guidance on how to diagnose or fix this issue. Thanks!
VIN is from the 8th digit, which typically indicates model year and production batch. Confirming this can help identify specific service bulletins or known issues.
The engine in my vehicle is a 2.7L inline-four, common in early 2003 Intrepid models. This may affect the EVAP system behavior and sensor response.
P0452 - NVLD Pressure Switch Stuck Closed Condition: When monitored immediately after engine start, the Powertrain Control Module (PCM) activates the NLVD solenoid. If the PCM does not detect the NVLD switch opening, a fault is logged as one trip. Possible Causes: - EVAP purge solenoid leak or stuck open (K70) - EVAP purge solenoid control circuit shorted to ground - NVLD switch operation failure - NVLD assembly malfunction (K107) - NVLD switch signal circuit shorted to ground - PCM fault Recommended troubleshooting: Use a bi-directional scan tool and test light to verify battery voltage at the purge solenoid. Inspect wiring harnesses for shorts or corrosion. The issue could be either the purge solenoid or the NVLD assembly itself. Do you have access to a bi-directional diagnostic tool? This is essential for accurate testing.
2003 Dodge Intrepid — what engine size and VIN year range are you referring to? This helps narrow down potential causes.