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Matt, Mechanical Engineer
Category: Car
Satisfied Customers: 22748
Experience:  BEng hons Mech engineering, in auto industry 22 years
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Bought car from dealership 24 hrs later problem with engine

Customer Question

Bought car from dealership 24 hrs later problem with engine management light on. Run fixed 6 wks later needed new starter motor. Returned fixed. Now engine management light back on. Each time I have been without my car for a few days. Only owned this for three months. Cost just short of £12000.five years old. Do I have to keep accepting repair and how can I tell if light problem is related or for a different thing?
Submitted: 3 years ago.
Category: Car
Expert:  Matt replied 3 years ago.

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.

Sorry to say that as the car is 2nd hand then you can't very well return it to the manufacturer and use the 'not fit for purpose' consumer rights

I'd suggest getting the fault code read as if the car is driving fine its likely to be minor

this will give you a better idea of whats actually wrong

Customer: replied 3 years ago.
According to citizens advice even if car is second hand fit of purpose can be used as car is not as described " in sound working order". Totally unreliable if power keeps going as I live in the highlands!
Expert:  Matt replied 3 years ago.
Hello Linda

well by all means try going back to the original garage and seeing if they'll return the car

however I'd still reccommend getting a diagnostic test doen as this will provide a good amount of information about just how serious the problem is
Expert:  Matt replied 3 years ago.
do you still need help with this?