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Matt
Matt, Mechanical Engineer
Category: Ford
Satisfied Customers: 22001
Experience:  BEng hons Mech engineering, in auto industry 22 years
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I have a 55 reg mondeo tdci 130 turbo diesel .When cold the

Customer Question

i have a 55 reg mondeo tdci 130 turbo diesel .When cold the car runs fine when it gets warm the car goes into lymph mode,new turbo just fitted.
Submitted: 2 years ago.
Category: Ford
Expert:  Shantal-Mod replied 2 years ago.
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Expert:  Shantal-Mod replied 2 years ago.
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Expert:  Matt replied 2 years ago.
Hello

if its going into limp home then yhou should have a check engine light or other fault light and this typically means one or more of the sensors has failed or has a faulty connection.

The fault can be something quite simple and nothing that’s going to stop the car to something quite major that will reduce engine power and possibly stop the engine

The ECU senses this and may put the car into 'limp home' mode which typically limits the revs and the amount of power available. Usually the car is safe to drive for a short distance as the mode is intended is intended to get you home without incurring any engine damage

The quickest route to repair is to have the car plugged into a diagnostic machine which will read off the fault code stored in the ECU (providing the light is still on at this point) and indicate which sensor has failed or whether the fault is more serious.

You can do a very rough and ready check yourself by unplugging sensors one at a time and seeing if any of them change the driving condition which would indicate the most recently unplugged sensor is the faulty one. This method is not foolproof though and reading a fault code off is the better method.
Expert:  Matt replied 2 years ago.
Hi

do you still need help ?