P2188 is rated as medium severity. Schedule service — affects performance or emissions.

P2188

System Too Rich at Idle (Bank 1)

Q: What does code P2188 mean?

System Too Rich at Idle (Bank 1): The engine is running rich at idle on bank 1. May indicate a leaking fuel injector or faulty fuel pressure regulator.

Powertrain Code · Medium

What does P2188 mean?

The engine is running rich at idle on bank 1. May indicate a leaking fuel injector or faulty fuel pressure regulator.

System: Fuel System

P2188 is a powertrain diagnostic trouble code indicating system too rich at idle (bank 1). This code is classified as medium severity, which means: schedule service — affects performance or emissions.

Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your vehicle.