TSBs

Inspecting Jeep EVAP purge hose placement

Jan. 15, 2025

This bulletin applies to 2021-2022 Jeep Grand Cherokee vehicles built on or after Nov. 11, 2021, and on or before Jan. 1, 2022, equipped with a 5.7l V8 VVT engine.

Mike Mavrigian

Related To:

Mitchell 1

Example of a purge tube pushed too far into the elbow.

This bulletin applies to 2021-2022 Jeep Grand Cherokee vehicles built on or after Nov. 11, 2021, and on or before Jan. 1, 2022, equipped with a 5.7l V8 VVT engine. The MIL may be on. DTC P0441 (EVAP purge system performance) and/or P0452 (EVAP pressure switch A stuck closed) may be stored.

Incorrectly installed purge tubes into the elbow. Note that the tube is seated too deeply, preventing flow.

Inspect the purge hose at the intake manifold. Is the purge tube pushed too far into the elbow?

Correct tube position. The tube stop bead is flush with the end of the elbow.

If so, pull the nylon tube from the rubber elbow until the bead is positioned at the edge of the elbow.

Another example of a correctly seated tube. Notice the tube's stop bead is visible.

Ensure that the elbow is seated properly at the intake manifold port.

About the Author

Mike Mavrigian | Motor Age Editor

Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.