2008 Cadillac STS TSB 10114908

Cadillac TSB #PIP4919E

2008 Cadillac STS

TSB Document:

Affected Component: ENGINE (PWS)

Summary
This Preliminary Information communication provides information to the technician about vehicle that may have black smoke on a cold start. A dual-pulse injection strategy is utilized during engine cold start to reduce the time required to bring the catalytic converter up to operating temperature. This split injection strategy lasts for about 60 seconds on cold start. This process may cause the customer to see increased black smoke during cold start and should be considered normal.

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Date Published
OCT 19, 2015
NHTSA TSB #
10114908
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