P2195 – Meaning, Causes, Symptoms, & Fixes

What Does P2195 Mean?

The P2195 code is a result of the engine control module indicating that the oxygen sensor is fluctuating outside its optimal range. This specified range is characterized by a minimum of 10 times per second. This sensor is nicknamed the air/fuel ratio sensor, as it monitors the exhaust between the catalytic converter and the engine. This code indicates that the engine is running rich, and that is has been unsuccessful in its attempt to lean out due to the air/fuel ratio reaching a point where it can not be corrected by the ECM.

P2195 Symptoms

  • Check engine light
  • Vehicle runs rough
  • Engine misfires

P2195 Cause

  • Frayed oxygen sensor circuit wiring/connectors
  • Faulty heated oxygen sensor bank 1
  • Malfunctioning fuel injector
  • Vacuum leaks
  • Fuel pressure too high/low
  • A/F sensor relay faulty

Code P2195 Severity – Moderate 

This trouble code will not prevent your vehicle from running. The most common result is lowered fuel economy. However, if left unsolved, this code could cause eventual damage to other components of your vehicle causing more engine codes to be detected and further implications towards the drivability of your vehicle.

Code P2195 Common Diagnosis Mistakes

Prematurely replacing the mass airflow sensor before attempting to visually inspect the wiring around the oxygen sensor(s) for chafed/frayed wiring.

P2195 Diagnosis

  • Tools Needed to Diagnose:

Difficulty of Diagnosis and Repair – (1-6)

  1. Check to see if there are any other codes along with P2195 and clear your Check Engine Light with FIXD.
  2. Check the freeze frame data and fuel gauge to pinpoint the issue.
  3. Conduct a visual inspection of wiring around the oxygen sensor(s) for fraying or disconnection.
  4. Visually check mass airflow sensor to see if it needs cleaning before replacing.
  5. Replace vacuum lines or intake air tube if signs of cracks or disconnections.
  6. Consider replacing oxygen sensor if the check-engine light persists.
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