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Engine Power is Reduced - any knowledge?

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Discussion Starter · #1 · (Edited)
It's a fantastic car, but I hope somebody has knowledge to help...


The car shows the below faults after being driven 20 minutes and more. When the car reaches 90 degrees temperature it remains there for a couple minutes and then

When I drive and press the throttle especially when I need to increase speed I get the following messages “Engine Power is Reduced”, then the engine gets sluggish and increases temperature.

If I continue to drive and I press the throttle especially when I need to increase speed the engine keeps being sluggish (This is when the temperature reaches appr. 110 degrees) and I get the message “AC Off Due to High Engine Temp.” Irrespectively I have the AC on.

If I continue to drive and I press the throttle especially when I need to increase speed the engine keeps being sluggish. When the temperature reaches the Maximum(!) degrees I get the message “Idle engine high engine temperature” (similar to this message).

If I seize pressing the throttle (not trying to speed up), the car decreases speed and after appr. 15-20 seconds the temperature goes back to normal to 90 degrees and I can continue driving.

Let me note, when the weather is between 0-8 degrees Celsious the errors are persistent and the car goes to normal after more time. When the weather degrees are more than 9 degrees C the car after the 15-20 sec break goes back to normal and is fine and I can speed up normally (no limit on speeding up).

After this stage, sometimes it increases temperature after a while, sometimes it doesn’t.

Also, while the car increases temperature the engine fan is working to cool down the engine which is not heated – sensors just show the engine is overheated but it’s not, I have stopped the car and checked myself.


The car has been to 4 garages, has passed diagnoses and none have found the cause. The messages are NOT kept in its history and they are not displayed if don’t speed up (if I don't press the throttle) as I described. The error messages are not saved in the car’s memory.


The following actions were carried out with no success:

DIAGNOSIS

THERMOSTAT Change

THERMOSTAT GASKET Change

TEMPERATURE SENSOR & SWITCH Change

ENGINE COOLANT ANTIFREEZE Change

CONTROLLED WASTE DISPOSAL

AIR FILTER Change

FUEL FILTER Change

POLLEN FILTER Change

OIL FILTER Change Screenshot_2015-11-20-22-26-27 (2).png
Screenshot_2015-11-20-22-26-27 (2).png
20151120_175436 (3).jpg


Videos and pictures are available......

HELP PLEASE...........
 

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Discussion Starter · #6 ·
Thank you guys.

The car has 45K miles. Last service was carried out 3 weeks ago - nothing was brought to indicate the cause/ fault.

I am not sure whether they used
used an op-com or tech 2. Would that help?

A Vauxhall garage in particular, has tried to identify the problem and after 2 days of tests they asked me to take it back claiming there is no fault...they clearly didn't bother to get their hands dirty and try solve a difficult issue.
 

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A lot of code readers can't pick up Vauxhalls fault codes. Particularly ones that don't put the EML light on. If you've took it to a Vauxhall garage then they would/should of used an MDI lead which would get any fault code stored. Without a fault code or some live data it's going to be nearly impossible to be of much help on here.
 

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Discussion Starter · #9 ·
A lot of code readers can't pick up Vauxhalls fault codes. Particularly ones that don't put the EML light on. If you've took it to a Vauxhall garage then they would/should of used an MDI lead which would get any fault code stored. Without a fault code or some live data it's going to be nearly impossible to be of much help on here.
The car has been taken to Vauxhall garage. After 2 days of tests they "found nothing".

When I asked them whether they drove the car to get live data they told me they can't continue spending much time driving my car as they were very busy (!).
I get the error every time I drive it. The V engineers claim they didn't...

Another garage (non Vauxhall) has plugged in a computer and have experienced the error (they haven't captured any specific error) so tried to fix it with the mentioned actions.
Unsuccessfully...
 

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So when did this set of faults appear ? Is this a stop/start model ?
 

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Thanks. Please see my other reply.
Anyone having resolved such an issue?
The problem is we don't know exactly what the issue is, same as the garages you are going to don't know either.
Ideally you need to record some live data so it can be read and see where the issue(s) occurs. This will give us a starting point.

We would like to tell you what part to change to sort the problem however its not always that easy, especially when your car is only 4 years old and with low miles there is not always known same issues/fixes/common faults.

If your not confident with cars i would suggest going to a independent garage they can record live data etc and tell you what they think the problem is, you can then go to a car garage and have that work carried out, or report back here for help.
 

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Discussion Starter · #14 ·
The problem is we don't know exactly what the issue is, same as the garages you are going to don't know either.
Ideally you need to record some live data so it can be read and see where the issue(s) occurs. This will give us a starting point.

We would like to tell you what part to change to sort the problem however its not always that easy, especially when your car is only 4 years old and with low miles there is not always known same issues/fixes/common faults.

If your not confident with cars i would suggest going to a independent garage they can record live data etc and tell you what they think the problem is, you can then go to a car garage and have that work carried out, or report back here for help.
I will wait a bit longer in the hope for more replies (if at all possible) since admittedly I am not confident with cars I will go to another independent garage where they can record live data etc and tell me what they think the problem is.
To be honest, I am not sure what "live data" means in the car engineering language.
Cheers again.
 

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I will wait a bit longer in the hope for more replies (if at all possible) since admittedly I am not confident with cars I will go to another independent garage where they can record live data etc and tell me what they think the problem is.
To be honest, I am not sure what "live data" means in the car engineering language.
Cheers again.
Live Data is just that , live data recording from the cars engine management system whilst the car is being driven , this then allows a skilled diagnostic trained mechanic look at what's happening & check the figures / values being given out by the sensors to the ECU & other modules .
 
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When the car reaches 90 degrees Engine temperature it remains there for a couple minutes and then while I continue normally driving I get those set of faults.

Yes, start/ stop it is.
What I meant was when did this problem first start appearing ?
 

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The car has been taken to Vauxhall garage. After 2 days of tests they "found nothing".

When I asked them whether they drove the car to get live data they told me they can't continue spending much time driving my car as they were very busy (!).
I get the error every time I drive it. The V engineers claim they didn't...

Another garage (non Vauxhall) has plugged in a computer and have experienced the error (they haven't captured any specific error) so tried to fix it with the mentioned actions.
Unsuccessfully...
Is there another Vauxhall dealer in your area not of the same franchise, if so try them, the previous dealer might just have lazy mechanics, if they don't find the fault within the first hour they'll just sit back and do nothing.
 

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i have exactly the same problem as this atm! same car same reg same engine and i notice the start/stop isnt working prior to this happening!
Stop / start is turned off if any of the systems criteria isn't met , for instance battery only holding a 75% charge will turn the stop / start off as it needs to be say 77% or above . I wonder if the coolant temperature sensor is playing up , the ECU thinks engine is overheating hence the temperature rise & the cooling fans coming on when in fact the engine isn't , this would most likely knock the stop / start off .
 
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