OBD · Fuel delivery
P2187 System too lean at idle (bank 1)
What this code means
P2187 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.
Most common causes
- Intake air leak#1
A hiss at idle with an unstable idle often means a split hose or intake gasket.
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
Frequently asked questions
What does code P2187 mean?
P2187: System too lean at idle (bank 1). P2187 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 P2187?
Monitor. You can drive normally but get it checked in the coming weeks. It may fail an MOT or roadworthiness test.
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.