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Gallagher99
Gallagher99, Senior Vehicle Technician
Category: Ford
Satisfied Customers: 3765
Experience:  SVQ LEVEL 3, QAULIFIED FORD SENIOR TECHNICIAN , ATA REGISTERD ,12 YEARS EXPERIENCE
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Got engine mulfunction sign and skid signs on the dashboard

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Got engine mulfunction sign and skid signs on the dashboard of my ford s max.it also lost power when im going over 60
Assistant: Is the power loss consistent, or does it fluctuate?
Customer: After that it gain power again
Assistant: What is the model/year of your Ford?
Customer: It lost power when im going on hills
Assistant: What year is your Ford?
Customer: Ford smax 2012
Assistant: Are you fixing your vehicle yourself? What have you tried so far?
Customer: No..i have to take it to the garage
Assistant: Anything else you want the Mechanic to know before I connect you?
Customer: Once i turn off the engine and turn it back on,the warning lights disappear.It does that every time
Customer: replied 6 days ago.
??

Hi there good evening you and sorry for the delayed response

My name is Brian And I would be happy to assist you Tonight

 

 

 

 

The ideally you must have a diagnostic fault code check carried out as this is an imperative part of the diagnosis

most commonly the codes that is logged is p2263 or p003a most commonly it’s p003a

Turbocharger boost system /range performance

 

This code is set when the actual boost pressure doesn't match the desired boost pressure

This causes the vehicle to enter limp home mode

 

This can be caused by several different systems which impact the boost /turbo pressure and if intermittent can be difficult to pinpoint the exact cause

 

The system basically works as follows

The turbo actuator (variable vanes) is controlled by a vacuum solenoid

The vacuum solenoid is controlled by the vehicles pcm/ecu

The pcm varies the vacuum to the turbo depending on power demanded

 

commonly the fault is the turbo vacuum solenoid (turbo boost valve )

Which can leak internally intermittently under certain driving conditions

 

When this happens the vacuum drops very slightly causing the actuator to move from the desired position thus initiating limp home mode

 

The parameters are so tight on modern day diesels the slightest issue causes limp home mode to be brought on

 

With an intermittent fault like yours

The first check would be to check that the turbo diaphragm is holding vacuum and the actuator is moving when vacuum is applied ( this will already have been done )

 

If all ok then before this turbo boost solenoid valve (is replaced )

Other possible and common causes of your described fault

is that the vanes inside the turbo may be sticking very slightly due to carbon Build up (common on vehicles like yours where you are going small cold runs ie school runs

(this is harder to diagnose as the root cause ) due to the inability to see the vanes inside the turbo

 

I would advise trying a good quality turbo cleaner (this goes in your fuel tank )

And then Driving the vehicle at high Revs -lower gears on the Motorway this can help clean the carbon off the vanes as high turbo temperatures can burn the carbon off the vanes and free the turbo off

 

If the fault is still persisting Then a live road test using datalogger should be carried out by the dealerships senior /master technician (I suspect this will have already been done ) but if the fault hasn't occurred with the technician it doesn't prove anything as due to the intermittent nature of the fault it's imperative for the technician to monitor what is happening when the fault occurs so the data can be recorded as this allows the sensor / signals to be monitored

 

I have seen vehicles used for as long as 1-2 weeks to try and reproduce intermittent concerns the fault with datalogger connected

 

In my experience I think this may be a case of sticking vanes inside the turbo

Which to resolve I would try a few turbo cleaners firstly as the turbo replacement is expensive

 

As the isn't a hard fault the technician must be certain this is the issue before replacing it due to the cost and time involved in replacing it

 

If you need any further help or technical assistance going forward

please let me know and I will do my upmost to assist you

If you are satisfied with my answer /advice thus far

PLEASE REMEMBER TO RATE MY ANSWER

as is how iam Accredited for my advice and to build my online profile

Kind regards in advance and have a nice evening and a merry Christmas

 

positive feedback /bonuses Is kindly appreciated

 

Kindest regards in advance

Brian

 

Customer: replied 6 days ago.
What about changing the fuel filter will this help?

 

Hi there

 

the fuel filter wouldn’t bring on the ESP light

the ESP light comes on when the torque v demand parameter of the pcm isn’t matched

this is more commonly down to a boost issue rather than a fuel starvation

ideally you need to get the fault code retrieved firstly before throwing parts at it and I can advise even further if required

as the cide is so imperative to correctly diagnosing the issue

 

kindest regards in advance

brian

 

Customer: replied 6 days ago.
How do i clean the turbo

Hi there

I always advise a carbon burn off test drive firstly

I advise trying a good quality turbo cleaner (this goes in your fuel tank )

And then warm the vehicle Up and then Drive the vehicle at high Revs -lower gears on the Motorway for around 20-30 mins this can help clean the carbon off the vanes as high turbo temperatures can burn the carbon off the vanes and free the turbo off


If you need any further help or technical assistance going forward ie wiring assistance

please let me know and I will do my upmost to assist you

If you are satisfied with my answer /advice thus far

PLEASE REMEMBER TO RATE MY ANSWER

as is how iam Accredited for my advice and to build my online profile

Kind regards in advance and have a nice evening and a merry Christmas

 

positive feedback /bonuses Is kindly appreciated

 

Kindest regards in advance

Brian

Customer: replied 6 days ago.
Can you give the name of the turbo cleaner

Hi there I would advise using the Wynn’s extreme turbo cleaner

this is what I use when these type of turbo issues arise

 

 

If you need any further help or technical assistance going forward ie wiring assistance

please let me know and I will do my upmost to assist you

If you are satisfied with my answer /advice thus far

PLEASE REMEMBER TO RATE MY ANSWER

as is how iam Accredited for my advice and to build my online profile

Kind regards in advance and have a nice evening and a merry Christmas

 

positive feedback /bonuses Is kindly appreciated

 

Kindest regards in advance

Brian

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