Real ChatGPT answer · index seedXdQN5J9fusMcompleteAutomotive · car repair and maintenanceinformational

Can you search for the most frequent causes of a Ford F-150 check engine light when the diagnostic code points to an emissions leak?

ChatGPTgpt-63 queries11/1/2026
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Fan-out diagram

The searches the AI actually ran for this prompt.

SEED QUERY
Can you search for the most frequent causes of a Ford F-150 check engine light when the diagnostic code points to an emissions leak?
3 real searches · 1 real-search pass
Ford F-150 EVAP system leak diagnosis common causes P0455 P0456 Ford technical service bulletinGoogle ↗
OBSERVEDReason
Ford F-150 EVAP emissions leak codes common causes purge valve vent valve capless fuel filler neck hoses P0455 P0456Google ↗
OBSERVEDReason
Ford F-150 owner manual check fuel fill inlet capless fuel system emissions leak warningGoogle ↗
OBSERVEDInstruction

Badge and edge weight = share of passes that produced the query. Hover a query for its intent and routing format.

Query classes

Google's semantic query class for every sub-query: what kind of answer each search is after, simulated vs real.

ChatGPT real searches (3)
Short factOther / navigationalComparisonConsequenceReason67%DefinitionInstruction33%Yes / no

Classes come from the query-classifier (a local Laya model). 1 of 3 calls are low-confidence (under 50%) — hover a query in the table to see its confidence.

Searches and sources

ChatGPT3 real searches · gpt-6
Ford F-150 EVAP system leak diagnosis common causes P0455 P0456 Ford technical service bulletin Google ↗
Ford F-150 EVAP emissions leak codes common causes purge valve vent valve capless fuel filler neck hoses P0455 P0456 Google ↗
Ford F-150 owner manual check fuel fill inlet capless fuel system emissions leak warning Google ↗

Queries

3 queries · click a column to sort
Query / typeSearchIntentQuery classRouting formatClusterFreq ↓Weight
Ford F-150 EVAP system leak diagnosis common causes P0455 P0456 Ford technical service bulletin
OBSERVED
Google ↗
AI Mode ↗
—Reason——1x
of 1
Ford F-150 EVAP emissions leak codes common causes purge valve vent valve capless fuel filler neck hoses P0455 P0456
OBSERVED
Google ↗
AI Mode ↗
—Reason——1x
of 1
Ford F-150 owner manual check fuel fill inlet capless fuel system emissions leak warning
OBSERVED
Google ↗
AI Mode ↗
—Instruction——1x
of 1