For Shop Owners

P2099 - Post Catalyst Fuel Trim System Too Rich Bank 2

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3 What does this mean?

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
What does this mean?

Possible symptoms

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

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

P2099 Information for specific makes

P2099 CHRYSLER Downstream Fuel Trim System 2 Rich
P2099 DODGE Downstream Fuel Trim System 2 Rich
P2099 FORD Post Catalyst Fuel Trim System Too Rich Bank 2
P2099 JEEP Downstream Fuel Trim System 2 Rich
P2099 LINCOLN Post Catalyst Fuel Trim System Too Rich Bank 2
P2099 MERCURY Post Catalyst Fuel Trim System Too Rich Bank 2

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P2099 Comments

Help us improve Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P2099 code? Have you replaced any parts?
Any information is appreciated. Thanks
Repair Importance Level: 3
1=Low 2=Medium 3=High
Repair Difficulty Level: 3
1=Easy 2=Moderate 3=Hard

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