Disconnected Charge Air Cooler Outlet Air Tube

The charge air cooler outlet air tube may be disconnected on some 2019 Equinox, Terrain, and Malibu models equipped with the 1.5L 4-cylinder engine (RPO LYX). As a result, the vehicle may exhibit reduced engine power. DTCs P0172 (Fuel Trim System Rich), P0299 (Engine Underboost), P0101 (Mass Air Flow Sensor Performance), P0506 (Idle Speed Low) and/or P1101 (Intake Air Flow System Performance) may be set.

Confirm the connection of the charge air cooler outlet tube at the throttle body. (Fig. 18) If the tube is disconnected, inspect the charge air cooler tube and throttle body for any damage. Replace any damaged parts, if found.


Fig. 18


TIP: The throttle body and mass airflow (MAF) sensor associated with the listed DTCs should only be replaced if they are damaged or found to be the cause of the code.

If the charge air cooler pipe is disconnected from the throttle body, also inspect the inside of the charge air cooler pipe for a possible missing O-ring seal. If the O-ring seal is missing, replacement of the charge air cooler pipe assembly will be required.

Retainer Kit

If the charge air cooler outlet tube is found to be damaged or the O-ring seal is missing, replace the tube assembly. Use the Vehicle Identification Number (VIN), Service Information, and the GM Electronic Parts Catalog to determine the correct part to order.

If the charge air cooler outlet tube has become disconnected, but the O-ring seal is not missing and the tube end is not damaged, contact the Warranty Parts Center (WPC) using the request form available in #PIP5651D to order a charge air cooler outlet tube retainer kit. The retainer kit includes a spring, two retainers, and installation instructions.


– Thanks to Rob Smith


Updated August 29, 2019

Diagnosing DTC P3075
GM Service Know-How


  1. It sounds like multiple issues may have happened. The disconnect could have blown out the seal in the tube to throttle body connection. Check for the presence of the seal in the end of the tube. Also, if a leak has not been found, it’s recommended to use a smoke machine.

  2. Hey there, Had one about six
    weeks ago, tube disconnected at T, body, inspection showed no damage, ordered and installed retainer kit, The Equinox came back 500 miles later with check eng lamp on, DTC P1101, intake air flow performance,found document that had you inspect Tube at the charge air cooler conduit, (right front side of vehicle), O ring showed slight deformation as showed in document, replaced tube, , two hundred miles later DTC came back, was a history code, light was off at time car was brought in,(k20 PCM has current software), reviewed how this dtc is monitored, can’t see a leak,this is a type B DTC, , After review I inspected and replaced Multifunction sensor. will have see what happens.
    Have you see any issues other than what ive already did with this car?

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