1999 Chevrolet Suburban P0453 - Evaporative Emissions Control System Pressure Sensor High Input
My 1999 Chevrolet Suburban is showing a P0453 diagnostic trouble code, indicating a high input reading from the evaporative emissions control system pressure sensor. This code suggests an issue with the fuel vapor pressure monitoring system, potentially due to a faulty sensor or a leak in the charcoal canister system. I've checked for recent modifications such as fuel pump module replacements or electrical work, but no major changes have been made recently. The vehicle has not exhibited noticeable performance issues, though the check engine light remains on.
Do you have an OBD2 scanner? What is the FTP sensor voltage reading? Have there been any recent repairs such as a fuel pump module replacement or electrical work that might affect the emissions system?