Some 2022 Buick Encore GX owners may notice that their vehicle’s cruise control system is not working as intended. Now, the cause behind this issue has been identified, as has as a solution to be implemented by GM technicians.
According to a recent report from GM TechLink, some 2022 Buick Encore GX customers may notice that the cruise control system will not set or resume after using the brake pedal has been depressed. In these conditions, it may be necessary to pull the brake pedal up to once again engage cruise control. Additionally, the condition may be intermittent, and cruise control may return to normal operation if the vehicle is turned off and restarted.
The GM TechLink report identifies excessive brake pedal free play as the root of the issue. If the brake pedal moves rearwards while accelerating, it may result in an inaccurate Learned Release Position in the Engine Control Module (ECM), with the ECM Brake Pedal Position sensor showing a six-percent pedal travel value or more, thus preventing the 2022 Buick Encore GX cruise control system from engaging.
To fix this issue, GM TechLink is recommending that a technician first verify that the Brake Pedal Position Sensor Learned Released Position is showing an inaccurate reading. To do so, technicians will conduct a test drive with the cruise control engaged, looking at the onboard GDS 2 data.
While the vehicle is accelerating during the test drive, the Brake Pedal Position Sensor may drop to a lower value than the normal release position. This could cause a drop in the Brake Pedal Position Sensor Learned Released Position as well, with the ECM showing a percentage of travel greater than zero when traveling at a steady speed with the pedal released, thus preventing the cruise control from engaging.
If these conditions are found during a test drive, it’s recommended that a GM technician replace the brake and accelerator pedal assembly in order to fix the issue.