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2008 Buick Lucerne P0480 Emissions Failure - Relay Replacement Not Resolving Issue

Model: 2008 Buick Lucerne Fault Code: P0480 Posted: 2016-03-16 20:02

I own a 2008 Buick Lucerne and am experiencing persistent emissions failure. I've already replaced the repair temp sensor and the relay, but the P0480 diagnostic code returns after each reset. The issue continues despite these repairs. What steps should I take next to resolve this problem? Please advise on possible causes or further troubleshooting procedures.

Related fault codes
P0480
Comments (1)
Anonymous 2016-03-17 07:05

To troubleshoot the P0480 code in a 2008 Buick Lucerne, you will need a wiring diagram and a test light. Verify that the relay is receiving 12V power and check if the switching voltage is properly being sent to the PCM terminal. Ensure all connections are secure and inspect for any intermittent faults in the circuit.