diff --git a/scripts/codex_audit_service.py b/scripts/codex_audit_service.py
index ba86514..938276e 100644
--- a/scripts/codex_audit_service.py
+++ b/scripts/codex_audit_service.py
@@ -673,19 +673,6 @@ def _job_dedupe_key(payload: dict[str, Any]) -> str:
 def _classify_codex_exec_failure(text: str) -> str:
     if any(word in text for word in ("quota", "rate limit", "too many active", "budget")):
         return "quota_or_capacity_failure"
-    if any(word in text for word in ("timeout", "timed out", "temporarily", "unavailable", "connection", "network")):
-        return "transient_service_failure"
-    codex_auth_config_signals = (
-        "not authenticated",
-        "authentication failed",
-        "login required",
-        "please log in",
-        "invalid api key",
-        "401 unauthorized",
-        "403 forbidden",
-    )
-    if any(signal in text for signal in codex_auth_config_signals):
-        return "auth_or_config_failure"
     return "unknown_failure"
 
 
diff --git a/scripts/run_monthly_codex_audit.py b/scripts/run_monthly_codex_audit.py
index f8f5be1..edc4731 100644
--- a/scripts/run_monthly_codex_audit.py
+++ b/scripts/run_monthly_codex_audit.py
@@ -172,19 +172,6 @@ class BridgeError(RuntimeError):
 def _classify_codex_exec_failure(text: str) -> str:
     if any(word in text for word in ("quota", "rate limit", "too many active", "budget")):
         return "quota_or_capacity_failure"
-    if any(word in text for word in ("timeout", "timed out", "temporarily", "unavailable", "connection", "network")):
-        return "transient_service_failure"
-    codex_auth_config_signals = (
-        "not authenticated",
-        "authentication failed",
-        "login required",
-        "please log in",
-        "invalid api key",
-        "401 unauthorized",
-        "403 forbidden",
-    )
-    if any(signal in text for signal in codex_auth_config_signals):
-        return "auth_or_config_failure"
     return "unknown_failure"
 
 
diff --git a/service/ai_gateway_service.py b/service/ai_gateway_service.py
index 45ad57c..c663ddc 100644
--- a/service/ai_gateway_service.py
+++ b/service/ai_gateway_service.py
@@ -437,19 +437,6 @@ def _job_dedupe_key(payload: dict[str, Any]) -> str:
 def _classify_codex_exec_failure(text: str) -> str:
     if any(word in text for word in ("quota", "rate limit", "too many active", "budget")):
         return "quota_or_capacity_failure"
-    if any(word in text for word in ("timeout", "timed out", "temporarily", "unavailable", "connection", "network")):
-        return "transient_service_failure"
-    codex_auth_config_signals = (
-        "not authenticated",
-        "authentication failed",
-        "login required",
-        "please log in",
-        "invalid api key",
-        "401 unauthorized",
-        "403 forbidden",
-    )
-    if any(signal in text for signal in codex_auth_config_signals):
-        return "auth_or_config_failure"
     return "unknown_failure"
 
 
diff --git a/tests/test_run_monthly_codex_audit.py b/tests/test_run_monthly_codex_audit.py
index a6b9e35..f16cc12 100644
--- a/tests/test_run_monthly_codex_audit.py
+++ b/tests/test_run_monthly_codex_audit.py
@@ -541,6 +541,9 @@ def test_service_failure_classification_ignores_source_code_secret_words(self) -
         allowlist_message = "codex exec failed: raise ValueError('not allowed by source allowlist')"
         self.assertEqual(classify_service_failure(allowlist_message), "unknown_failure")
         self.assertEqual(codex_audit_service._classify_failure(allowlist_message), "unknown_failure")
+        forbidden_message = "codex exec failed: fixture text includes 403 forbidden"
+        self.assertEqual(classify_service_failure(forbidden_message), "unknown_failure")
+        self.assertEqual(codex_audit_service._classify_failure(forbidden_message), "unknown_failure")
         self.assertEqual(classify_service_failure("codex exec failed: too many active requests"), "quota_or_capacity_failure")
         self.assertEqual(
             classify_service_failure("source_repository foo is not allowed by service allowlist"),