OBD · Fuel delivery

P0093 Fuel system large leak detected

Stop driving

What this code means

P0093 is a generic OBD code shared by all manufacturers since 2001 for petrol and 2004 for diesel. It relates to: fuel delivery. The code tells you what the ECU measured as abnormal, not necessarily which part to replace.

Severity: Stop driving. Do not drive. Carrying on can cause expensive damage or make the car unsafe.

Most common causes

  1. Dirty or faulty injector#1
    Garage price: Diesel injector £245 – £650
  2. Fuel pump#2
    Garage price: Fuel pump £190 – £530

Cost of related repairs

Independent garageMain dealer
Diesel injector£245 – £650£310 – £975
Fuel pump£190 – £530£250 – £820

How to read this code

An OBD scanner plugged into the 16-pin socket under the steering wheel reads and clears codes. Bluetooth models cost £20 to £40. Clearing a code without fixing the fault is pointless: it comes back.

Related problems

Engine cranks but won't startCar judders when acceleratingLoss of power and limp modeWhite smoke from exhaustBlack smoke when acceleratingRough or unstable idle

Frequently asked questions

What does code P0093 mean?

P0093: Fuel system large leak detected. P0093 is a generic OBD code shared by all manufacturers since 2001 for petrol and 2004 for diesel. It relates to: fuel delivery. The code tells you what the ECU measured as abnormal, not necessarily which part to replace.

Can I drive with code P0093?

Stop driving. Do not drive. Carrying on can cause expensive damage or make the car unsafe.

How much does it cost to fix P0093?

Diesel injector: £245 – £650, Fuel pump: £190 – £530.

How to read this code

An OBD scanner plugged into the 16-pin socket under the steering wheel reads and clears codes. Bluetooth models cost £20 to £40. Clearing a code without fixing the fault is pointless: it comes back.