Having problems with your 2004 Cadillac Deville ?
2004 caddy deville customer changed plugs,coils,fuel pump and check engine light still comes on for a random misfire,coolant temp sensor and lean condition bank one
Change coolant temp sensor. it will be reporting wrong leading to the misfire.
Repair Help & Product Troubleshooting for 2004 Cadillac Deville
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