Why is my car losing power?

Limp mode is the usual cause — the ECU has detected a fault and limited power to protect the engine. A scan reveals which.

Here's a quick, honest answer from a working UK mechanic — what causes it, what it costs to fix, and what to do next.

Is it safe to drive home in limp mode? — Yes if you can do so without holding up motorway traffic — but get it diagnosed the same day.

Could it be the fuel filter? — On diesels, definitely yes. A blocked filter restricts fuel and triggers low-power codes. Replacement £80–£180.

Bob's Mechanical Repairs — independent family-run garage in Birnam, Dunkeld, Perthshire. Call 01350 727 276 or email bob@bobsmechanicalrepairs.co.uk.