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P2198 Code - Oxygen Sensor Signal Biased/Stuck Rich Bank 2 Sensor 1

- Code Popularity: 28,220 Views
- Repair Importance Level: 2/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P2198?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Front Heated Oxygen Sensor Bank 2
  • Front Heated Oxygen Sensor Bank 2 harness is open or shorted
  • Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection
  • Inappropriate fuel pressure
  • Faulty fuel injectors
  • Intake air leaks may be faulty
  • Vacuums leaks
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How to Fix the DTC P2198?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2198 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Excessive Fuel Consumption

Code P2198 Description

The Engine Control Module (ECM) uses the heated oxygen sensor information to regulate the air-fuel ratio close to a stoichiometric ratio. This maximizes the catalytic converter’s ability to purify the exhaust gas. The sensor detects oxygen levels in the exhaust gas and sends this signal to the ECM. The inner surface of the sensor element is exposed to outside air. The outer surface of the sensor element is exposed to exhaust gas. The sensor element is made of platinum coated zirconia and includes an inte- grated heating element. The heated oxygen sensor has the characteristic whereby its output voltage changes suddenly in the vicinity of the stoichiometric air-fuel ratio. The heated oxygen sensor generates output voltage between 0 V and 1.0 V in response to the oxygen concentration in exhaust gas. When the output voltage of the heated oxygen sensor is 0.55 V or more, the ECM judges that the air-fuel ratio is RICH. When it is 0.4 V or less, the ECM judges that the air-fuel ratio is LEAN. Under normal condition, the output voltage from the heated oxygen sensor alternates RICH and LEAN sides periodically. If the heated oxygen sensor outputs RICH signal (or LEAN signal) constantly, or if the heated oxygen sensor cannot output enough voltage to reach the minimum specification, the ECM interprets this as a malfunction in the heated oxygen sensor and sets a DTC.

OBDII Code P2198 - Oxygen Sensor Signal Biased/Stuck Rich Bank 2 Sensor 1 - AutoCodes.com
P2198 Code - Oxygen Sensor Signal Biased/Stuck Rich Bank 2 Sensor 1

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Information for Specific Makes

  • P2198 Dodge Oxygen Sensor Signal Biased/Stuck Rich Bank 2 Sensor 1
  • P2198 Ford Oxygen Sensor Signal Biased/Stuck Rich Bank 2 Sensor 1
  • P2198 Lexus Oxygen Sensor Signal Stuck Rich Bank 2 Sensor 1
  • P2198 Lincoln Oxygen Sensor Signal Biased/Stuck Rich Bank 2 Sensor 1
  • P2198 Mercury Oxygen Sensor Signal Biased/Stuck Rich Bank 2 Sensor 1
  • P2198 Toyota Oxygen Sensor Signal Stuck Rich Bank 2 Sensor 1

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