DTC P0172 Alfa Romeo
System Too Rich (Bank 1)
System Too Rich (Bank 1)
Description
When the sum of the short term and long term fuel corrections is less than a calibrated threshold, generally 67% (100% is nominal), the fail timer will increment. After 30 seconds of fail time the diagnostic fails.
Cause and Solution
O2 Return Wiring Issue
O2 Sensor
Map Sensor
Leaking Evap Purge Solenoid
Excessive Fuel Pressure Or Poor Fuel Quality Contamination
Fuel Pump Module
Fuel Injector Leaking Into Engine
Engine Mechanical
Video Guide
Diagnostic Info
- DTC Code: P0172
- Brand: Alfa Romeo