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Ask Ryan Schott Your Own Question
Ryan Schott
Ryan Schott,
Category: Cadillac
Satisfied Customers: 82
Experience:  technician at Demarois Buick Gmc
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Check engine is on code p0087, yes but it came back on

Customer Question

check engine is on code p0087
JA: Have you scanned the code? Have you tried to reset it?
Customer: yes but it came back on reduced power message
JA: What is the model/year of your Cadillac?
Customer: 2008 sts 3.6
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: no just want to have an idea what it is before taking it to a shop
Submitted: 3 months ago.
Category: Cadillac
Expert:  Ryan Schott replied 3 months ago.

It will either be a high pressure fuel pump or a low pressure pump, if you can get a fuel pressure gauge you can test the low pressure side there is a valve to hook too on the back of the motor. There is other possibilities like a cam or a sensor but 90% of the time you are looking at a high pressure pump.