diff --git a/go/viperutil/internal/sync/sync.go b/go/viperutil/internal/sync/sync.go
index c211c5fa611..11cb028c286 100644
--- a/go/viperutil/internal/sync/sync.go
+++ b/go/viperutil/internal/sync/sync.go
@@ -18,7 +18,6 @@ package sync
 
 import (
 	"context"
-	"errors"
 	"fmt"
 	"sync"
 	"time"
@@ -28,6 +27,8 @@ import (
 	"github.com/spf13/viper"
 
 	"vitess.io/vitess/go/viperutil/internal/log"
+	"vitess.io/vitess/go/vt/proto/vtrpc"
+	"vitess.io/vitess/go/vt/vterrors"
 )
 
 // Viper is a wrapper around a pair of viper.Viper instances to provide config-
@@ -89,7 +90,7 @@ func (v *Viper) Set(key string, value any) {
 
 // ErrDuplicateWatch is returned when Watch is called on a synced Viper which
 // has already started a watch.
-var ErrDuplicateWatch = errors.New("duplicate watch")
+var ErrDuplicateWatch = vterrors.New(vtrpc.Code_FAILED_PRECONDITION, "duplicate watch")
 
 // Watch starts watching the config used by the passed-in Viper. Before starting
 // the watch, the synced viper will perform an initial read and load from disk
@@ -121,7 +122,7 @@ var ErrDuplicateWatch = errors.New("duplicate watch")
 // to ensure the config file can be read in properly.
 func (v *Viper) Watch(ctx context.Context, static *viper.Viper, minWaitInterval time.Duration) (cancel context.CancelFunc, err error) {
 	if v.watchingConfig {
-		return nil, fmt.Errorf("%w: viper is already watching %s", ErrDuplicateWatch, v.disk.ConfigFileUsed())
+		return nil, vterrors.Wrapf(ErrDuplicateWatch, "%s: viper is already watching %s", ErrDuplicateWatch.Error(), v.disk.ConfigFileUsed())
 	}
 
 	ctx, cancel = context.WithCancel(ctx)
diff --git a/go/viperutil/internal/value/value.go b/go/viperutil/internal/value/value.go
index 9feb5caba02..a958d642bcf 100644
--- a/go/viperutil/internal/value/value.go
+++ b/go/viperutil/internal/value/value.go
@@ -17,7 +17,6 @@ limitations under the License.
 package value
 
 import (
-	"errors"
 	"fmt"
 
 	"github.com/spf13/pflag"
@@ -25,6 +24,8 @@ import (
 
 	"vitess.io/vitess/go/viperutil/internal/registry"
 	"vitess.io/vitess/go/viperutil/internal/sync"
+	"vitess.io/vitess/go/vt/proto/vtrpc"
+	"vitess.io/vitess/go/vt/vterrors"
 )
 
 // Registerable is the subset of the interface exposed by Values (which is
@@ -59,7 +60,7 @@ func (val *Base[T]) Get() T      { return val.BoundGetFunc(val.Key()) }
 
 // ErrNoFlagDefined is returned when a Value has a FlagName set, but the given
 // FlagSet does not define a flag with that name.
-var ErrNoFlagDefined = errors.New("flag not defined")
+var ErrNoFlagDefined = vterrors.New(vtrpc.Code_INVALID_ARGUMENT, "flag not defined")
 
 // Flag is part of the Registerable interface. If the given flag set has a flag
 // with the name of this value's configured flag, that flag is returned, along
@@ -75,7 +76,7 @@ func (val *Base[T]) Flag(fs *pflag.FlagSet) (*pflag.Flag, error) {
 
 	flag := fs.Lookup(val.FlagName)
 	if flag == nil {
-		return nil, fmt.Errorf("%w with name %s (for key %s)", ErrNoFlagDefined, val.FlagName, val.Key())
+		return nil, vterrors.Wrapf(ErrNoFlagDefined, "%s with name %s (for key %s)", ErrNoFlagDefined.Error(), val.FlagName, val.Key())
 	}
 
 	return flag, nil