diff --git a/client.go b/client.go
index 56a4935..5a9f3ce 100644
--- a/client.go
+++ b/client.go
@@ -127,6 +127,12 @@ func (c *Client) SelectVehicle(vin string) (*VehicleData, error) {
 	}
 	vinCheck(vin)
 
+	// Validate session before executing the request
+	if !c.validateSession() {
+		c.logger.Error(APP_ERRORS["SESSION_EXPIRED"])
+		return nil, errors.New(APP_ERRORS["SESSION_EXPIRED"])
+	}
+
 	params := map[string]string{
 		"vin": vin,
 		"_":   timestamp()}
@@ -319,6 +325,12 @@ func (c *Client) SubmitAuthCode(code string, permanent bool) error {
 // getContactMethods retrieves the available contact methods for two-factor authentication (2FA).
 // {"success":true,"dataName":"dataMap","data":{"userName":"a**x@savin.nyc","email":"t***a@savin.nyc"}}
 func (c *Client) getContactMethods() error {
+	// Validate session before executing the request
+	if !c.validateSession() {
+		c.logger.Error(APP_ERRORS["SESSION_EXPIRED"])
+		return errors.New(APP_ERRORS["SESSION_EXPIRED"])
+	}
+
 	params := map[string]string{}
 	reqUrl := MOBILE_API_VERSION + apiURLs["API_2FA_CONTACT"]
 	resp, err := c.execute(POST, reqUrl, params, false)
diff --git a/vehicle.go b/vehicle.go
index edcfaab..724abca 100644
--- a/vehicle.go
+++ b/vehicle.go
@@ -451,7 +451,7 @@ func (v *Vehicle) GetClimatePresets() error {
 	}
 
 	// Validate session before executing the request
-	if v.client.validateSession() {
+	if !v.client.validateSession() {
 		v.client.logger.Error(APP_ERRORS["SESSION_EXPIRED"])
 		return errors.New(APP_ERRORS["SESSION_EXPIRED"])
 	}
@@ -517,7 +517,7 @@ func (v *Vehicle) GetClimateQuickPresets() error {
 	}
 
 	// Validate session before executing the request
-	if v.client.validateSession() {
+	if !v.client.validateSession() {
 		v.client.logger.Error(APP_ERRORS["SESSION_EXPIRED"])
 		return errors.New(APP_ERRORS["SESSION_EXPIRED"])
 	}
@@ -560,7 +560,7 @@ func (v *Vehicle) GetClimateUserPresets() error {
 	}
 
 	// Validate session before executing the request
-	if v.client.validateSession() {
+	if !v.client.validateSession() {
 		v.client.logger.Error(APP_ERRORS["SESSION_EXPIRED"])
 		return errors.New(APP_ERRORS["SESSION_EXPIRED"])
 	}
@@ -612,7 +612,7 @@ func (v *Vehicle) GetVehicleStatus() error {
 	}
 
 	// Validate session before executing the request
-	if v.client.validateSession() {
+	if !v.client.validateSession() {
 		v.client.logger.Error(APP_ERRORS["SESSION_EXPIRED"])
 		return errors.New(APP_ERRORS["SESSION_EXPIRED"])
 	}
@@ -680,7 +680,7 @@ func (v *Vehicle) GetVehicleCondition() error {
 	}
 
 	// Validate session before executing the request
-	if v.client.validateSession() {
+	if !v.client.validateSession() {
 		v.client.logger.Error(APP_ERRORS["SESSION_EXPIRED"])
 		return errors.New(APP_ERRORS["SESSION_EXPIRED"])
 	}
@@ -737,7 +737,7 @@ func (v *Vehicle) GetVehicleHealth() error {
 	}
 
 	// Validate session before executing the request
-	if v.client.validateSession() {
+	if !v.client.validateSession() {
 		v.client.logger.Error(APP_ERRORS["SESSION_EXPIRED"])
 		return errors.New(APP_ERRORS["SESSION_EXPIRED"])
 	}
@@ -802,7 +802,7 @@ func (v *Vehicle) executeServiceRequest(params map[string]string, reqUrl, pollin
 	}
 
 	// Validate session before executing the request
-	if v.client.validateSession() {
+	if !v.client.validateSession() {
 		v.client.logger.Error(APP_ERRORS["SESSION_EXPIRED"])
 		return errors.New(APP_ERRORS["SESSION_EXPIRED"])
 	}