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Andy
Andy, Volvo Expert Technician
Category: Volvo
Satisfied Customers: 3782
Experience:  One of only a handful of ACTUAL Volvo dealership technicians on JA, ASE Master Certified with L1
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My daughter was driving our 2004 Volvo s 80 and the check

Customer Question

My daughter was driving our 2004 Volvo s 80 and the check engine light flashed and stayed on. The car was sputtering and making a clicking sound. I bought the car new and it has been cared for mechanically. the car has 86000 miles on it. what do you think it is?
Submitted: 1 year ago.
Category: Volvo
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 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.

from your description it could be a broken exhaust, a leaking inlet pipe or even something mechanically serious

Expert:  Andy replied 1 year ago.

Hello,

My name is ***** ***** I am a Volvo dealer technician. The above information is rather generic. A "broken exhaust" is not going to be the cause here. The flashing check engine light means there is a misfire. If the spark plugs were replaced on time at 60,000 miles, the most likely cause is a bad ignition coil. These are very common.

Expert:  Andy replied 1 year ago.

To check, first have the fault codes read to see which cylinder is misfiring. Then, swap that cylinder's coil with one from another cylinder and clear the codes. Test drive and re-check codes when the light flashes to see if the misfire moved.