p2187
Moderate
Kia · Sedans
System Too Lean at Idle (Bank 1)
Quick Answer
Error code P2187 on your Kia Sedans means: System Too Lean at Idle (Bank 1). This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Check for vacuum leaks around idle fuel lines
2
Test oxygen sensor at idle conditions
3
Measure fuel pressure at idle
4
Inspect fuel injector spray pattern
5
Clean or replace mass airflow sensor
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Oxygen sensor
Fuel injector cleaner
Vacuum sealant
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