On certain vehicles, When driven at highway speed in extremely low temperatures, without engine warm up, condensed moisture from a Positive Crankcase Ventilation (PCV) port may seep toward the brake vacuum port inside the intake manifold and start to freeze. If accumulated ice plugs the port, vacuum assist to the brakes will be lost and the increased brake pedal pressure required could lead to an increase in stopping distance. Correction: Vacuum port will be repaired by removing the clearance at the top of the separator between the brake vacuum port and the PCV expansion room of the intake manifold.
Certain passenger vehicles equipped with an automatic transmission. Due to a unique combination of conditions, which consist of cold ambient temperatures, load applied from air conditioner and other electrical devices, and immediately after starting the engine, there is a possibility that the vacuum in the intake manifold could be insufficient for the brake booster. When the brake is applied under this combination of conditions, vacuum assist to the brakes would decrease, and the increased pedal pressure required could lead to an increase in vehicle stopping distance. Correction: dealers will replace the brake booster and front brake pads.
On certain vehicles, the recess that retains the rubber seal ring, which is located at the end of the brake master cylinder body, may be corroded due to an improper washing process. In this condition, brake fluid may leak from the seal, or a small amount of air may enter the master cylinder, which could lead to an increase in stopping distance. Correction: After inspection, if a brake fluid leak from the master cylinder is detected or there is air in the master cylinder, the dealer will replace the master cylinder and the brake booster.