Engine shuts down while driving - Page 3

Ilan · 06-30-2006, 07:00 AM

Old Man,

My Sorento is stock, no tune box.

The symptoms are the same as yours:
1. All four occasions, it has been in the summer, last month.
2. All occasions has been going uphill accelerator fully depressed.
3. Only at one occasion the check engine came on.

The dealer got P1188 fault code as I wrote above. The computer showed that there is a problem with the CTS (coolant temperature sensor) and per my request it was replaced.

It has been a week now and the fault did not happen yet. Today I took the Sorento to the same place it happened before, pedal to the metal, and all OK.

I will keep updating.

OLD MAN · 06-30-2006, 07:17 AM

Just spoke to my dealer and requested the sensor £12.50 he is sending it to my office by next Wednesday.

I will change it myself and let you know the results.

Old Man

OLD MAN · 06-30-2006, 08:13 AM

Ilan

I was looking at your original note re this problem.

You stated an error code of P1188 I tryed to look up this code with the site that you quoted from Murphwiz and can not find it.

I also looked on google and could not find anything.

Plesae let me know how you got to the conclution of the coolent temp sensor from P1188 - Fuel pressure, leakage.

I will still replace mine as the cost is very low but would like to understand more about this problem.
Thanks

Old Man

Ilan · 06-30-2006, 03:14 PM

Old man,

Error code P1188 is not listed on the site. P1180 and above is related to fuel pressure.

Q: How you got to the conclution of the coolent temp sensor from P1188 - Fuel pressure, leakage?

A: The mechanic checked the on board computer's log, the computer recorded engine coolant temperature of -25.7C (bellow zero) when the fault happened, such wrong reading can only come from the CTS.

Also if you look at Kia's site, look at the picture attached, see that one of the symptoms of engine stalling is a faulty CTS.

Replacing the CTS is not as easy as one may think. You need to disconnect two hoses, one for air and one for water to get to it, use a 19mm ratchet and do it when the engine is cold!

CTS.JPG

Let me know if it helped.

Ilan

OLD MAN · 07-01-2006, 08:10 AM

I took off the engine cover and looked for the Coolant temperature sensor from the photo but mine differs slightly with the pipes being more intrusive. I will call my garage on Monday to see if i can do it with one of the mechanics and learn a little. Also see his take on all of this.

My reason for the questions are there are around ten possibilities including the Coolant temperature sensor for this problem (I know that your data had more conclusive results) but looking through lots of different sites the Coolant temperature sensor doesn't seem to cause stalls with our symptoms and the engine should sound a lot rougher that it does more of the time.

My garage said that it could cause limp home mode but mine stalls out right.
I am wondering (maybe Murphwiz could have something to say on this) if this component may be the cause for faulty results being sent to the computer and as a result the wrong mix of diesel and air causing a pollution sensor to shutdown the engine. Just weird that it only happens under load.

I have also seen articles regarding the gas pedal sensors; the diesel does not use a cable which also makes some sense as it only seems to happen with it nearly fully depressed.
Please let me know what you think.

Old Man

Murphwiz · 07-01-2006, 08:40 AM

Diesels don't really have a limp home mode as such, not throttle plate, so no mechanical device to create the limp home.
The throttle is fly by wire, the pedal itself has 2 sensors in it, these can be viewed on current data with hi-scan to see what they are up to.

Ilan · 07-01-2006, 08:59 AM

Old man,

There are 10 possibilities, but if a sensor gives up the on board computer should tell us and limp home.

My guessing is the the CTS gives the computer some kind of false reading and the computer shuts down the engine for protection. I am guessing that if the engine overheats the same will happen (Murphiz?).

I agree that the temp gauge should act when it happens, but it may happen so fast that we miss it.

It may not be the cure to the problem, but for now the Sorento runs great.

Ilan

OLD MAN · 07-03-2006, 07:19 AM

Ilan is you car still running well?

I spoke to my dealer again and he wants to have the car in for testing.
I explained about the engine coolant sensor but he is not convinced, he also mentioned brake light sensor, gas pedal sensor and other things that need to be checked.
I will update as I can
Thanks

Old Man

Ilan · 07-03-2006, 07:56 AM

Quote:

Originally Posted by OLD MAN

Ilan is you car still running well?

Old Man

Yes, from the day I replaced the sensor no more stalls.

My dealer was also sceptic regarding the CTS. If you do find a different cause please let me know.

OLD MAN · 07-05-2006, 09:28 AM

Today my car went into the shop and as you probably guest no codes.
They checked all over and could not find any problem.
They have changed the CTS at my request and cleaned my dirty K&N air filter.
All this was done under warranty and with no fuss. They spent a good hour on it and then spent 20 minuets discussing it with me.

They did test the old CTS but it read about the right temperature (possible intermittent fault).

The journey back to work was on the motorway and I did put down my foot on a couple of hills the automatic changed up a gear and drove nicely. It does seem to feel different slightly less power but does stay at 80 on motorway with no effort and accelerates up nicely. This may all be in my head so I will keep on testing.

Thanks Ilan