2005 KIA Optima 4cyl - Crankshaft Position Sensor and over-current sending to CPS (2024)

Hi...I have a 2005 KIA Optima 4cyl that is giving me, my mechanic, and now the dealer trouble. Long story. The car died on the road at about 15 mph...the tach just dropped to zero! Towed to mechanic...and the Crankshaft Position Sensor was bad. Had that replaced along with the timing belt, and another belt (for oil pump?) while the CPS was replace. Car ran great for 6-8 cycles, mechanic took it on road, and it died within 10 feet of the shop. He tested the new CPS...fine.

However, the CPS was receiving 7.3V v. 5V required signal. The guess is that the PCM is bad and needs to be replaced, but my mechanic could not test whether the PCM was bad. Had the car towed to the dealer (perhaps BIG mistake). They "diagnosed" the probelem, and told the mechanic two different stories, and me two further different stories over 4 phone calls! The dealer says the CPS has frayed harness wire, and needs to be replaced. My mechanic warranteed the work and told them he would fix that since he put that in. NOW...the dealer won't give us the remaining "diagnosis" since they aren't getting the work!....

So, besides a possible short from a frayed wire harness on the CPS, what could cause an over-current sending to CPS? Do we need to replace the PCM, and is there a way to test without having a "good" PCM on-hand?

Any and all HELP will be much appreciated.....

Regards, Chris

Did you pay the dealer for a diagnosis? If so, its yours and they have to give it to you. If not, well, you're not out anything.

I cant blame the dealership. They are not in the business of free diagnosis for other mechanics.

You previous mechanic should fix the wiring. Then see if it clears the problem.

If your chosen mechanic cannot diagnose the PCM, you may have to either try to pick up one at a wrecking yard and try it , or go back to the dealership.

My sympathies to you. I know what it is like to have these levels of electrical problems. I own a Buick Reatta.

d-

The car was sent to the dealer with arrangement that we would pay for the diagnosis, they would provide the diagnosis, and my mechanic would fix the car. I have not been to the dealer to pay the bill yet. In general I would think the dealer under this arrangement would follow through. I'll pay for what was agreed, but am reluctant to have them fix anything is they aren't being straight forward in telling us what's wrong.

Thanks for the posts!

The car was sent to the dealer with arrangement that we would pay for the diagnosis, they would provide the diagnosis, and my mechanic would fix the car. I have not been to the dealer to pay the bill yet. In general I would think the dealer under this arrangement would follow through. I'll pay for what was agreed, but am reluctant to have them fix anything is they aren't being straight forward in telling us what's wrong.

Thanks for the posts!

************

So the dealership is not abiding by a pre-agreement? Since you haven't paid yet, maybe this is yet negotiable.

I wish we had electric cars. I am so shi**ing tired of mysterious electronics that the manufacturers themselves can't fix for less that a $1000, if at all.

I can assure you that they would make it too complicated for the average Joe to fix that too. I'm familiar with an electric forklift, name withheld. Anyway, it's got two shoe-boxed size controllers for the drive wheels, left and right. It's also got another controller to run the hydraulics that lift up the forks. There's also a computer that ties everything together. This computer needs to be reprogrammed for just about ANY part that gets replaced. There is money to be made by this company's tech department. The electric car manufacturers will follow suit.

I can assure you that they would make it too complicated for the average Joe to fix that too. I'm familiar with an electric forklift, name withheld. Anyway, it's got two shoe-boxed size controllers for the drive wheels, left and right. It's also got another controller to run the hydraulics that lift up the forks. There's also a computer that ties everything together. This computer needs to be reprogrammed for just about ANY part that gets replaced. There is money to be made by this company's tech department. The electric car manufacturers will follow suit.

***** I am afraid you are totally correct. There is only one way to stop this sort of extortion, and that is to boycott the companies who choose to do business this way.

Well don't buy ANY of the import hybrids then. Those ALL use multiple controller computers in them.

I dont doubt that either. It is necessary technically to have multiple controllers on such a system, BUT it is not necessary to make electronics which are intended to be failure prone and unserviceable by anyone but a dealership.

In fact, if that could be proven to be true, it might be getting close to some of the deadly sins in restraint of trade legislation.