diff --git a/backend-compliance/compliance/api/agent_compliance_check_routes.py b/backend-compliance/compliance/api/agent_compliance_check_routes.py
index 1fae9297..7d968edb 100644
--- a/backend-compliance/compliance/api/agent_compliance_check_routes.py
+++ b/backend-compliance/compliance/api/agent_compliance_check_routes.py
@@ -1271,7 +1271,9 @@ async def _fetch_text(url: str, doc_type: str = "") -> tuple[str, list[dict]]:
                     fallback_text = merged or cmp_cookie_text or ""
                     return fallback_text, cmp_payloads
     except Exception as e:
-        logger.warning("Consent-tester fetch failed for %s: %s", url, e)
+        # P90: verbose exception fuer Diagnose (war vorher empty)
+        logger.warning("Consent-tester fetch failed for %s: %s (%s)",
+                       url, str(e) or "(empty)", type(e).__name__)
 
     # 2. Fallback: direct HTTP fetch (works for SSR pages like BMW).
     # P7: kenntlicher UA + per-Domain Rate-Limit.
@@ -1416,7 +1418,9 @@ async def _autodiscover_missing(
                             len(body.get("cmp_payloads") or []),
                             len(cmp_text.split()))
         except Exception as e:
-            logger.warning("auto-discovery failed for %s: %s", base, e)
+            # P90: verbose exception fuer Diagnose
+            logger.warning("auto-discovery failed for %s: %s (%s)",
+                           base, str(e) or "(empty)", type(e).__name__)
 
     # Classify each discovered doc into a canonical doc_type
     by_type: dict[str, dict] = {}