Engine Error
P2187
System Too Lean at Idle (Bank 1)
Severity
Medium
Symptoms
Rough idle, stalling at stop signs, engine surging
Common Causes
- Stuck open purge valve
- Vacuum leak
- Failing MAF sensor
- Fuel pump pressure low
How to Fix
- 1 Test EVAP purge valve
- 2 Search for vacuum leaks
- 3 Clean or replace MAF sensor
- 4 Test fuel pressure at idle
Estimated Repair Cost
USD
$100
–
$600
Purge valve: $150; MAF: $200; Fuel pump: $400 - $600