OBDII Code List

P2097 BUICK - Post Catalyst Fuel Trim System Too Rich Bank 1

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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P2097 BUICK Possible Causes

  • Exhaust leak near O2 sensor
  • Faulty O2 sensor
  • Fuel contamination

First diagnose P2097 BUICK code

    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 terminals.

Cost of diagnosing the P2097 BUICK code

    Labor: 1.0

    The cost of diagnosing the P2097 BUICK 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.

P2097 BUICK Possible Symptoms

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

P2097 Buick Description

The Heated Oxygen Sensors (HO2S) are used for fuel control and catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content of the exhaust stream. When the engine is started, the engine control module (ECM) operates in an open loop mode, ignoring the HO2S signal voltage while calculating the air to fuel ratio. The ECM supplies the HO2S with a reference, or bias voltage of about 450 mV. While the engine runs, the HO2S heats up and begins to generate a voltage within a range of 0-1 000 mV. This voltage will fluctuate above and below the bias voltage. Once sufficient HO2S voltage fluctuation is observed by the ECM, closed loop is entered. The ECM uses the HO2S voltage to determine the air to fuel ratio. An HO2S voltage that increases above bias voltage toward 1 000 mV indicates a rich fuel mixture. An HO2S voltage that decreases below bias voltage toward 0 mV indicates a lean fuel mixture.
OBDII Code P2097 Buick - Post Catalyst Fuel Trim System Too Rich Bank 1 -

P2097 BUICK More Information

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