P2178 - System Too Rich At Off Idle Right Bank
- Faulty front heated oxygen sensor
- Ignition misfiring
- Faulty fuel injectors
- Incorrect fuel pressure
- Faulty Mass Air Flow (MAF) sensor
- Incorrect Positive Crankcase Ventilation (PCV) hose connection
With the Air/Fuel Mixture Ratio Self-Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxygen sensors 1. The Engine Control Module (ECM) calculates the necessary compensation to correct the offset between the actual and the theoretical ratios.
In case the amount of the compensation value is extremely small (The actual mixture ratio is too rich.), the ECM judges the condition as the fuel injection system malfunction and light up the MIL (2 trip detection logic).
P2178 CADILLAC Fuel Trim System Rich at Cruise or Accel
P2178 CHEVROLET Fuel Trim System Rich at Cruise or Accel
P2178 DODGE Throttle Actuator Ctrl Sys-Hi Airflow Detected
P2178 GMC Fuel Trim System Rich at Cruise or Accel
P2178 MAZDA System Too Rich At Off Idle Right Bank
P2178 PONTIAC Fuel Trim System Rich at Cruise or Accel
P2178 SATURN Fuel Trim System Rich at Cruise or Accel
A class action lawsuit has been filed against Mercedes-Benz USA, LLC (“Mercedes-Benz” or “Defendant”...
I'm getting several codes that I can find but not these two P1497 P2178 anyone know what thet are?...
i am showing codes of p2178 and p2188 on a 2005 mazda mx6 with a 4 cyc. were do i start next after h...
system too rich off idle (current low voltag ) what that mens and witch sensors should i change?...
Any information is appreciated. Thanks