2007年10月24日 · Customer states: "Check Engine Light" was on/pulled code for P0449 (Evap Emission Control)/Check and report code P0449 Evap Vent System failure/Pressurize Evap system. Gas cap leaking (Refer to Job #3) System would not hold pressure/replaced cap.

In depth diagnosis and inexpensive repair of common P0449 engine code on these popular Chevy and GMC light trucks.

2018年8月20日 · P0449 indicates that the valve or solenoid circuit that controls the evaporation system is not functioning properly. The EVAP system cycles fuel vapor from the gas tank into the intake manifold, a charcoal canister, or directly into the air depending on the model of vehicle.

2014年7月15日 · DTC P0449: Evaporative Emission (EVAP) Vent Solenoid Control Circuit. This indicates a problem with the circuit for the Solenoid, not a leak issue. Check the "CNSTR VENT" fuse in the fuse box.

Diagnose the issue using a scan tool to confirm the P0449 code and pinpoint the exact cause. Inspect the vent solenoid valve, wiring, and connectors for any signs of damage or wear. Test the solenoid valve for proper operation and replace if necessary.

2015年10月30日 · Code p0449 can be caused by thieves trying to syphon gas. It has happened to me with a 2007 canyon and now a 2003 sierra 1500! What occurs is the thieves use a copper 3/8 flex tube to snake down the direct evap line that …

First, the vent valve in the evaporative emissions system might be faulty. Second, the connection, wires, or circuits in the system might be having a connectivity issue that is causing a false reading.

2014年3月25日 · (P0449 is an electrical issue, not mechanical or and air leak.) The break was up inside the split loom tubing. Months ago I ordered a new connector for the vent valve with about 1 foot of wire attached.

2014年8月4日 · If you "Search "P0449" here, or over at 355nation.net, you will find at least a weeks worth of reading. This is a common problem. Here are a couple of links to replacing the Canister Vent Solenoid Valve: How to: Replace your Evap Canister/Solenoid (P0455 code) - Chevrolet Colorado & GMC Canyon Forum

Causes and Fixes GMC or Chevy P0449 engine code: Evaporative Emission Vent Solenoid Valve Control Circuit Malfunction.Amazon Link to Smoke Machine: https://a...