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George H.
George H., ASE Certified Technician
Category: Kia
Satisfied Customers: 18390
Experience:  Hyundai Certified and 15+ years as an ASE Maser Tech
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Kia Optima: 2006 Kia Optima with a 2.4L DOHC engine, has a

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2006 Kia Optima with a 2.4L DOHC engine, has a check engine light with a code of P0320.
Replaced the the crank positioning sensor less than a year ago. The car only has 99,500 miles on it.what could be making the light come on. Also the engine tachometer on the dash is very intermittant.

Hello I will help you with your question,

The cam and crank sensors use each other to determine who is failing but they are not too smart. Often you will get a P0340 code (cam sensor) when it is the crank sensor that is failing and the other way around when the cam sensor fails.

As long as the timing belt has been replaced in the last 30,000 mile I would be replacing th cam sensor. If the belt has not been replaced then it is entirely possible the sensor is damaged and the belt and the crank sensor needs to be replaced.

Click below for picture

https://dl.dropboxusercontent.com/u/26725849/cam.pdf

Let me know what I can do to help you with this

Thank you

Customer: replied 3 years ago.

The code is P0320 not P0340.

I understand what the code is, the code is set by referencing the cam sensor against the crank sensor and the computer is not smart enough to tell which really has the problem.


The key is if the belt was replaced and any loose teeth that shed from the belt were removed from the timing cover. If the belt is less than 30,000 miles then I would be replacing the cam sensor as shown, if not then I would be looking in the timing cover for a damaged belt, damaged wiring harness to the sensor or a failed sensor.

Please let me know how I can help you

Thank you

Customer: replied 3 years ago.

The timing belt even if the car is still running good? The car runs pretty good.

Yes, the belt can shed a tooth ot two and that can crack the crank sensor causing a poor signal. Have the timing and balance belts been replaced?

If the crank sensor is OK then the cam sensor could have a problem and the computer is flagging the wrong sensor as they play off each other for the computer to determine which is the problem and the computer does not always flag the correct sensor.

Let me know what I can do to help

Thank you

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