DTC P0450 Or DTC P0451: Notes

Code Definition

DTC P0450: EVAP Pressure Sensor Fault
DTC P0451: EVAP Pressure Sensor Range/Performance Malfunction

CAUTION: If ECM replacement is instructed in following testing, always ensure ECM harness connector and ground circuit are okay. If either are suspect, repair and repeat testing to confirm ECM malfunction. If ECM is replaced, ECM must be programmed with proper ignition key code for engine immobilizer system. For programming procedures, see COMPUTER RELEARN PROCEDURES - IMPORT article in GENERAL INFORMATION.

NOTE: Vapor canister and some related components can be accessed through trunk by removing trunk floor mat and protective access cover at front of trunk. For component location, see appropriate illustration in THEORY & OPERATION article.