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Dave Nova
Dave Nova, Cadillac Technician
Category: Cadillac
Satisfied Customers: 1522
Experience:  ASE Master Certification. GM World Class Certification
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Cadillac CTS: My check engine light keeps coming on but the

Customer Question

My check engine light keeps coming on but the dealer keeps telling me that it's from gas cap not being put on right. But I know how to put cap on right way and my engine is not running right when light comes on and rpms keep jumping up and down while driving
Submitted: 1 year ago.
Category: Cadillac
Expert:  Ron Z. replied 1 year ago.
Did the Dealer happen to provide you with any Diagnostic Trouble Codes (aka "P-Codes")?