1996 Chevrolet Blazer P0440 Code: How to Fix Evaporative Emission System Fault and Pass Smog Check
Hi everyone, I'm new to car repairs and hoping for some advice. My 1996 Chevrolet Blazer is throwing a P0440 code indicating an evaporative emission control system malfunction. I believe I know the general cause, but I'm unsure if it's possible to pass a smog check with this code active. If not, what are the most affordable ways to fix it? My vehicle has been a persistent pain point for years, and I'd like to get it running properly without spending too much.
According to OBD-II code reference (http://www.obd-codes.com/p0440), a vehicle with an active P0440 code will not pass emission testing if the Check Engine Light is on or if the system monitors are not ready. To resolve this, inspect and replace the evaporative canister, purge valve, or charcoal filter—common causes of this fault. These parts are relatively inexpensive and easy to fix for a 1996 Blazer.