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Gary, ASE Certified Technician
Category: Cadillac
Satisfied Customers: 1054
Experience:  Senior Technician
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The rpm engine sensor surges up and down especially when it

Customer Question

the rpm engine sensor surges up and down especially when it get warm.
JA: Which sensor are you asking about? O2? MAP? Did any codes pop up?
Customer: and when its in park
JA: What is the model/year of your Cadillac?
Customer: 2004 3.6, cts
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: my mechanic changed the throttle body.
JA: Anything else you think the mechanic should know?
Customer: it seems to get worse when the engine get warm
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Cadillac Mechanic about your situation and then connect you two.
Submitted: 1 year ago.
Category: Cadillac
Expert:  Gary replied 1 year ago.

Hi there,

Can you tell me why your mechanic changed the throttle body, codes set etc?

Sounds like he hasn't performed an "idle learn" procedure after replacing it.


Expert:  Gary replied 1 year ago.

Hello again,

I hope my advice has been of assistance to you.

Kind regards