OBD P2196


Technical Definition:

Oxygen (O2) Sensor Signal Biased / Stuck Rich (Bank 1 – Sensor 1)

Trouble Code: P2196
Address: 0x2196
System: Powertrain
Subsystem: Fuel and Air Metering
Technical Description:

This code is considered generic because it applies to all makes and models of vehicles (1996-newer), although specific repair steps may be slightly different depending on the model.

Possible Causes:
  • Oxygen (O2) or A/F ratio sensor or sensor heater malfunction
  • Open or short in O2 sensor circuit (wiring, harness)
  • Fuel pressure or fuel injector problem
  • Faulty PCM
  • Intake air or engine vacuum leaks
  • Faulty fuel injector(s)
  • Fuel pressure too high or too low
  • PCV system leak/fault
  • A/F sensor relay faulty
  • MAF sensor malfunction
  • ECT sensor malfunction
  • Air intake restriction
  • Fuel pressure too high
  • Fuel pressure sensor malfunction
  • Fuel pressure regulator malfunction
  • Note on some vehicles that have been modified this code may be caused by the modifications (e.g. aftermarket exhaust, headers, etc.).

Possible Symptoms:

O2 Sensor Signal Stuck Rich Bank 1 Sensor 1

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Front Heated Oxygen Sensor Bank 1
– Front Heated Oxygen Sensor Bank 1 harness is open or shorted
– Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection
– Inappropriate fuel pressure
– Faulty fuel injectors
– Intake air leaks may be faulty
– Vacuums leaks

Specific Makes:

– Excessive Fuel Consumption