P2099 FORD - Post Catalyst Fuel Trim System Too Rich Bank 2

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Faulty Heated Oxygen Sensor
  • Heated Oxygen Sensor harness is open or shorted
  • Heated Oxygen Sensor circuit poor electrical connection
  • Exhaust leaks
  • Contaminated Heated Oxygen Sensor

Tech notes

Before replacing the Heated Oxygen Sensor, inspect the sensor connector for signs of damage, water ingress, or corrosion

Possible symptoms

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

P2099 Ford Description

The Powertrain Control Module (PCM) monitors the correction value from downstream Heated Oxygen Sensor (HO2S) as part of the fore-aft oxygen sensor control routine. The test fails when correction value is greater than a calibrated limit.
OBDII Code P2099 Ford - Post Catalyst Fuel Trim System Too Rich Bank 2 - AutoCodes.com

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