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P2198 is a diagnostic trouble code (DTC) for "O2 Sensor Signal Stuck Rich Bank 2 Sensor 1". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $69.99. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
O2 Sensor Signal Stuck Rich Bank 2 Sensor 1
This trouble code indicates that the upstream oxygen sensor on the second bank of the exhaust is sending a reference voltage to the powertrain control module that is not within the range of acceptance set by the vehicle manufacturer.
Some of the potential causes of this trouble code would include:
Some of the symptoms that a driver with this trouble code could potentially experience may include:
A mechanic may diagnose this trouble code by first locating the upstream oxygen sensor on the second bank of exhaust. Once this sensor has been located, the mechanic would then check the wiring and connectors associated with this sensor to make sure they are in good condition. If the circuitry is in good shape, the mechanic would then test the oxygen sensor itself.
There is a test in which a small torch can be used to heat up the inner portion of an oxygen sensor that has been removed from the vehicle. While the torch is heating up the oxygen sensor the mechanic can use a digital multimeter to check the voltage coming from the oxygen sensor. This will help determine whether or not the oxygen sensor has failed.
If both of these tests result in the oxygen sensor and circuitry being okay, the mechanic would then check fuel pressure and vacuum signal. After these numbers have been verified to be within the manufacturer’s specifications, the mechanic would test the powertrain control module. If the numbers are not within specification, the issues related to the fuel or vacuum systems must be resolved before any further diagnosis can take place.
A common mistake that could be made when diagnosing this trouble code would be replacing the oxygen sensor when the actual cause is a fuel pressure issue. It is important to check all aspects of the problem to ensure that no parts get replaced by mistake.
This code is not very serious because it does not cause any drivability issues. However, this trouble code should be diagnosed and repaired as soon as possible to save gasoline. This trouble code can end up costing more money if ignored than the cost of the repair depending on how long the trouble code is stored. With this being considered, repairing the vehicle would eventually pay for itself with the money that would be saved in fuel costs.
Repairs that can resolve the issues that are caused by this trouble code would include:
Replacing the upstream oxygen sensor on the second bank of exhaust
Replacing the wiring or connectors that are associated with the oxygen sensor that is upstream on the second bank of exhaust
Repairing a vacuum leak by replacing lines or gaskets
Repairing a major exhaust leak by welding new parts on or patching existing exhaust parts.
Replacing the powertrain control module.
Nobody likes to waste fuel. Consider your potential extra fuel costs when you discover that this trouble code is stored in your vehicle. These costs can add up pretty quickly. It is important to have all check engine lights diagnosed and repaired at the earliest possible opportunity in order to prevent any further issues with your vehicle.
YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230