diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/engine/AbstractEngineNewPayload.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/engine/AbstractEngineNewPayload.java
index 10155c25035..ac429c298ff 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/engine/AbstractEngineNewPayload.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/engine/AbstractEngineNewPayload.java
@@ -494,7 +494,7 @@ protected ValidationResult<RpcErrorType> validateBlobs(
     if (maybeParentHeader.isPresent()) {
       if (!validateExcessBlobGas(header, maybeParentHeader.get(), protocolSpec)) {
         return ValidationResult.invalid(
-            RpcErrorType.INVALID_PARAMS,
+            RpcErrorType.INVALID_EXCESS_BLOB_GAS_PARAMS,
             "Payload excessBlobGas does not match calculated excessBlobGas");
       }
     }
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/engine/EngineNewPayloadV2.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/engine/EngineNewPayloadV2.java
index ba7624a493e..fa15891750f 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/engine/EngineNewPayloadV2.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/engine/EngineNewPayloadV2.java
@@ -64,7 +64,7 @@ protected ValidationResult<RpcErrorType> validateParameters(
     }
     if (payloadParameter.getExcessBlobGas() != null) {
       return ValidationResult.invalid(
-          RpcErrorType.INVALID_PARAMS, "non-null ExcessBlobGas pre-cancun");
+          RpcErrorType.INVALID_EXCESS_BLOB_GAS_PARAMS, "Missing excess blob gas field");
     }
     return ValidationResult.valid();
   }
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/engine/EngineNewPayloadV3.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/engine/EngineNewPayloadV3.java
index c6bfb638c87..aeb88955d1b 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/engine/EngineNewPayloadV3.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/engine/EngineNewPayloadV3.java
@@ -60,7 +60,7 @@ protected ValidationResult<RpcErrorType> validateParameters(
       return ValidationResult.invalid(
           RpcErrorType.INVALID_BLOB_GAS_USED_PARAMS, "Missing blob gas used field");
     } else if (payloadParameter.getExcessBlobGas() == null) {
-      return ValidationResult.invalid(RpcErrorType.INVALID_PARAMS, "Missing blob gas fields");
+      return ValidationResult.invalid(RpcErrorType.INVALID_EXCESS_BLOB_GAS_PARAMS, "Missing excess blob gas field");
     } else if (maybeVersionedHashParam == null || maybeVersionedHashParam.isEmpty()) {
       return ValidationResult.invalid(
           RpcErrorType.INVALID_PARAMS, "Missing versioned hashes field");
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/engine/EngineNewPayloadV4.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/engine/EngineNewPayloadV4.java
index 09354fa1bac..b87eceed5d3 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/engine/EngineNewPayloadV4.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/engine/EngineNewPayloadV4.java
@@ -61,7 +61,7 @@ protected ValidationResult<RpcErrorType> validateParameters(
           RpcErrorType.INVALID_BLOB_GAS_USED_PARAMS, "Missing blob gas used field");
     } else if (payloadParameter.getExcessBlobGas() == null) {
       return ValidationResult.invalid(
-          RpcErrorType.INVALID_PARAMS, "non-null ExcessBlobGas pre-cancun");
+          RpcErrorType.INVALID_EXCESS_BLOB_GAS_PARAMS, "Missing excess blob gas field");
     } else if (maybeVersionedHashParam == null || maybeVersionedHashParam.isEmpty()) {
       return ValidationResult.invalid(
           RpcErrorType.INVALID_PARAMS, "Missing versioned hashes field");
diff --git a/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/engine/EngineNewPayloadV2Test.java b/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/engine/EngineNewPayloadV2Test.java
index 4d53d83cf8b..4e68cca76cb 100644
--- a/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/engine/EngineNewPayloadV2Test.java
+++ b/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/engine/EngineNewPayloadV2Test.java
@@ -170,7 +170,7 @@ public void shouldValidateExcessBlobGasCorrectly() {
 
     final JsonRpcError jsonRpcError = fromErrorResp(resp);
     assertThat(jsonRpcError.getCode()).isEqualTo(INVALID_PARAMS.getCode());
-    assertThat(jsonRpcError.getData()).isEqualTo("non-null ExcessBlobGas pre-cancun");
+    assertThat(jsonRpcError.getData()).isEqualTo("Missing excess blob gas field");
     verify(engineCallListener, times(1)).executionEngineCalled();
   }
 
diff --git a/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/engine/EngineNewPayloadV3Test.java b/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/engine/EngineNewPayloadV3Test.java
index 72f0108a692..d8cf86758f8 100644
--- a/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/engine/EngineNewPayloadV3Test.java
+++ b/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/engine/EngineNewPayloadV3Test.java
@@ -219,7 +219,7 @@ public void shouldValidateExcessBlobGasCorrectly() {
 
     final JsonRpcError jsonRpcError = fromErrorResp(resp);
     assertThat(jsonRpcError.getCode()).isEqualTo(INVALID_PARAMS.getCode());
-    assertThat(jsonRpcError.getData()).isEqualTo("Missing blob gas fields");
+    assertThat(jsonRpcError.getData()).isEqualTo("Missing excess blob gas field");
     verify(engineCallListener, times(1)).executionEngineCalled();
   }