Code : P219B
Make : MERCURY
Description : P219B MERCURY Bank 2 Air/Fuel Ratio Imbalance
Possible causes :
– Leaking or contaminated fuel injectors
– Low fuel pressure or running out of fuel
– Leaking evaporative emission (EVAP) canister purge valve
– Exhaust or intake air system leaks
– Exhaust gas recirculation (EGR) system
– Positive crankcase ventilation (PCV) sy
Solutions :
– Carry out a Reset via CarDiag
– Choose a better quality fuel
– Check that the tank cap is securely closed
– Check the oil level and add more if it is lower than MAX
– Restart an Automatic diagnostic via CarDiag
– If the fault persists, you can check the “Possible causes” listed above : visually inspect (by yourself (tutorials to come) or by a professional) the wiring harness and the associated connectors, check for damaged components, and look for broken, bent, pushed, or corroded connector pins.
