BATTERY MALFUNCTIONS

An incorrect or failing battery sounds straightforward, but ailments in this department are becoming more and more apparent on many newer cars, like this Fiesta, that have reached a certain age. It’s possible the driver won’t experience any driving faults, but will notice intermittent warning lights illuminating on the dash, then going out again, or that the dash is lit up like a Christmas tree.

In the early stages, the car will start normally. But if the problem is not addressed, the engine will crank for longer periods. In addition, the stopstart system could malfunction and the system’s warning light might illuminate. In addition, a quick diagnostic check of the ECUS will show voltage issues.

It’s important to carry out a battery check with the correct type of tester. An older drop-style test cannot be used. Not all models require coding, but this Ford does, so you need to tell the ECU that you have changed the battery and advise the system of the new battery’s number.

The batteries for this Fiesta (and many other recent models) are a lot more expensive than a traditional type – often more than £200. However, a quality battery of the correct type is essential. Look for the letters ‘EFB’ on the battery, standing for Enhanced Flooded Battery, for this Fiesta with its stop-start and smart-charge electrical systems.