Post Catalyst Fuel Trim System Too Lean


Table of contents

P2096 AUDI Possible Causes

  • Faulty Oxygen Sensor After Three-Way Catalytic Converter
  • Oxygen Sensor After Three-Way Catalytic Converter harness is open or shorted
  • Oxygen Sensor After Three-Way Catalytic Converter circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

How do I fix code P2096 AUDI?

  Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.

Cost of diagnosing the P2096 AUDI code

  The cost of diagnosing the P2096 AUDI code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P2096 AUDI Description

  The Oxygen Sensor After Three-Way Catalytic Converter downstream of the primary catalytic converter supplies the Engine Control Module (ECM) with a voltage signal (nonlinear) indicating rich or lean. If the primary catalytic converter is supersaturated with oxygen (lean mixture), Oxygen Sensor After Three-Way Catalytic Converter will send the Engine Control Module a nonlinear signal indicating the lean mixture condition. The mixture is then enriched with fuel until the oxygen has been displaced from the catalytic converter. This condition, in turn, is registered by Oxygen Sensor After Three-Way Catalytic Converter as a nonlinear signal indicating the rich mixture condition. The mixture is then leaned out by the Engine Control Module. If the nonlinear signal is received again, the mixture will again be enriched. The frequency, or period, during which the mixture is enriched or leaned out is variable, being dependent on the gas flow rate (engine load) at that moment.
The Oxygen Sensor After Three-Way Catalytic Converter contains the following components: The Heater For Oxygen Sensor 1 After Catalytic Converter and the Oxygen Sensor After Three-Way Catalytic Converter. Components cannot be serviced separately, it must be serviced as a unit.
The Diagnostic Trouble Code (DTC) will set when the Post Catalyst Fuel Trim System is not to factory specifications.

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