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Matt
Matt, Mechanical Engineer
Category: UK Car
Satisfied Customers: 20598
Experience:  BEng hons Mech engineering, in auto industry 22 years
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Powertrain malfunction (red) light is coming on the

Customer Question

Powertrain malfunction (red) light is coming on the dashboard on my jaguar
Submitted: 1 year ago.
Category: UK Car
Expert:  Matt replied 1 year ago.

Hello

On any car if you get a check engine light or other fault light this typically means one or more of the sensors has failed or has a faulty connection.

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.

If you can tell me how the car is driving with the fault I'll try to diagnose further

Customer: replied 1 year ago.
I haven't drove it since seen the light on what would the cost be to take it to a garage
Expert:  Matt replied 1 year ago.

hello

a quick check at a regular garage should be about £60

Expert:  Matt replied 1 year ago.

Hi

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