Update - 04 Optima runs then dies - ?crankshaft position sensor - Kia Forum
 
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post #1 of 7 (permalink) Old 01-09-2007, 01:47 PM Thread Starter
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Default Update - 04 Optima runs then dies - ?crankshaft position sensor

We're still working on this one - we've found out this Optima built after 1/04 does not have an in-line fuel filter. Bought the diagnostic tool and it shows code po335, crankshaft position sensor, circuit A fault. Does anyone know where this is located? How hard is it to change? Has anyone had this same problem? (we're trying to avoid the tow and labor charges - would like to replace ourselves). Thanks.
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post #2 of 7 (permalink) Old 04-19-2007, 02:05 PM
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the CPS is by the crankshaft pully that turns the timing belt:

You have to remove timing belt and balancerbelt. Not an easy job, but certainly doable.

Those balancer belts are weak in my opinion. I had one break and then it broke the CPS. Fortunately, the timing belt didn't break as well.
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post #3 of 7 (permalink) Old 04-19-2007, 05:24 PM
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it depends if it is a four cylider then it is behind the balance shaft belt but if it is a six cyl then the cps is on the radiator side of the engine and closer towards the transmission and it only has one ten mm bolt through it sorry that is the best i can do
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post #4 of 7 (permalink) Old 09-04-2007, 12:08 AM
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Default crankshaft senson?

you don,t have to remove timing belt to replace crankshaft sensor.
just removed the lower timing belt cover.it is do able. but you have remove alternator belt , aircondition belt.
You have to remove water pump sprocket and air condition sprocket first before removing lower timing belt cover.
Sensor is located right behind aircondition sprocket at the little bit at right side and top of left side of oil pump sorocket. It is piece of plastic tightened wiht two screws and it look like a square piece.
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post #5 of 7 (permalink) Old 01-10-2008, 09:59 PM
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Default Expensive Repair

My crankshaft sensor had to be replaced to the tune of $350. About the same price I paid to change the timing belt at 60,000 miles. It is the same labor roughly as doing the timing belt. I have a 2003 Optima 4 cyl with 65,000 miles.
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post #6 of 7 (permalink) Old 01-26-2008, 09:31 AM
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Default Crankshaft Sensor?

hi,
we just recently had the crankshaft position sensor replaced and unfortunately the timing and balancing belt, because the car died previously on the highway. Picked the car up yesterday and after driving 20 miles, the check engine light came on again and the car idle is very high, the car hasnt died yet and actually i am leery to drive it, but what is causing this and also we did not get a copy of the diagnostic code sheet, arent we supposed to get one?

Help!!!
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post #7 of 7 (permalink) Old 02-05-2008, 04:21 PM
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I have an 04/04 built Optima and I have having the exact same problem as the first posting.

I am a mechanic and this whole thing is driving me CRAZY! I have the code tester and have been dealing with this for about 3 wks now. I was getting NO CODES until just yesterday.

So all this led me to believe I was having a fuel related problem. Which the killer is, I changed out the fuel pump (very easy) and then drove the car over 50 miles w/o single problem. ALL GOOD! Nope! It started acting up again. Same issues, only thing this time, I finally got the code PO335.

The FUNNY thing is.............................I just spoke w/ a Kia Service Tech and acting as if I don't know anything about cars, he did tell me that the Crank Sensor HAS BEEN KNOWN to kill the car w/o popping a code. It is a VERY crazy thing that the Crank Sensor (a completely electrical part with NO MOVING PARTS!) can do that.

So, now I am going to have to buy a crank sensor and replace it. While I am at it, I will do the timing belt and get it all done. Just can't do it till Feb 15th.

While doing the work, I will take pictures and document the work. That way, anyone who wants to do it themselves, I will provide you the info, you will be able to do it yourself without having to pay all that labor.

I'll keep you all posted when I do this.
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