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Question

I have a 2004 Kia Optima showing DTC codes P1166 and P1167. What parts should be replaced to correct this?

Submitted: 661 days and 11 hours ago.

Category: Chevy

Value: $9

Status: AWAITING CUSTOMER ACTION

Optional Information:
2004 Kia Optima 2.7 liter

Already Tried:
Nothing. Looking for advice.

Accepted Answer

Hello XXXXXXXXXX, this problem could be caused by any number of different parts. It may be something as simple as a tune up or you may need to replace some sensors. How is the vehicle running and how many miles are on the vehicle?

Accepts:
Expert:	BOBBYSS
Pos. Feedback:	99.6 %
Answered:	1/31/2008

Technician/Service Advisor

ASE MASTER CERTIFIED, AA DEGREE AUTO/DIESEL TECH. 13YRS. CHEVY EXPER.

661 days and 11 hours ago.

Reply

The car idles terribly. It acts and smells like the mixture is too rich. Once it warms up and gets up to highway speeds, it runs as if there were no problem at all. It has bout 52,000 miles on it.

Posted by BOBBYSS 661 days and 11 hours ago.

Answer

Okay, if it smells rich then you are getting too much fuel. You may have a problem with the fuel pressure regulator or a leaking fuel injector. This can also be caused by bad oxygen sensors. Isn't the vehicle still under warranty?

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