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P2084 is a diagnostic trouble code (DTC) for "Exhaust Gas Temperature (EGT) Sensor Circuit Range/Performance Bank 1 Sensor 2". 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 $154.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $50.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
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Exhaust Gas Temperature (EGT) Sensor Circuit Range/Performance Bank 1 Sensor 2
Related Trouble Codes:
The P2084 diagnostic trouble code is an indication that there is a range/performance issue of the exhaust gas temperature (EGT) sensor 2 circuit on Bank 1.
The EGT sensor monitors the temperature of exhaust gas and sends this information to the powertrain control module (PCM) through a voltage signal. When the PCM receives this information, it will adjust accordingly in order to reduce harmful emissions that are expelled into the environment.
The EGT sensor is a resistor that reacts to temperature. As EGT levels increase or decrease, the resistance levels will change and the voltage signal will communicate these variations to the PCM. To ensure the EGT does not does not increase to dangerous levels that could damage the catalytic converter, the PCM will make adjustments to the air/fuel mixture or ignition timing. These adjustments are made according to the information in the voltage signal that is received from the EGT sensor. If these voltage signals go outside the predetermined range set by the vehicle manufacturer, this is an indication that the EGT sensor is not working properly. The PCM will store the P2084 diagnostic trouble code, and the Check Engine Light will come on.
Faulty EGT sensor
An internal short in the EGT sensor
EGT sensor wiring that is damaged, loose, or burnt
Exhaust has temperature sensor connectors that are damaged, disconnected, or corroded
A large exhaust leak located before the placement of the EGT sensor
A back pressure decrease, resulting from the installment of a high performance aftermarket exhaust system.
Uses an OBD-II scanner to collect all of the diagnostic trouble codes that have been stored by the PCM
Inspects all wiring for damage, disconnections, or melted wiring
Inspects all connectors for damage, disconnections, or corrosion
Inspects EGT sensor wiring and connectors at or near the exhaust for damage, disconnections, or melted wiring
Repairs or replaces all wiring and/or connectors that are damaged, loose, corroded, or melted
Clears all trouble codes and completes a test drive to see if the P2084 diagnostic trouble code comes back
If the P2084 diagnostic trouble code comes back, tests the EGT sensor resistance levels using a volt/ohmmeter (if the resistance level falls below 50 ohms, it will need to be replaced)
Clears all trouble codes and completes a test drive to see if the P2084 diagnostic trouble code comes back
If the P2084 diagnostic trouble code comes back, checks the EGT sensor voltage signal at the connectors (if the voltage signal is low or there is no voltage signal present, the EGT sensor connector at the PCM will need to be disconnected and tested for continuity)
Repairs or replaces any wiring and connectors that fail to meet voltage signal requirements
In the event that there is no continuity in the EGT sensor connector at the PCM, this indicates that the PCM is faulty and will need to be replaced and reprogrammed.
The most common mistake that is made when diagnosing the P2084 trouble code is mistaking the oxygen sensor for the EGT sensor.
It is also a common misconception that the EGT sensor is built inside of the heated oxygen sensor and for this reason, oxygen sensors are sometimes replaced in error.
A diagnostic trouble code is usually considered serious when it causes driveability issues or a change in performance. The P2084 trouble code is not known to cause driveability issues or changes in the performance of the vehicle, therefore it is not considered serious. Like all diagnostic trouble codes, an extended period of time should not pass before having them diagnosed and repaired. Allowing an extended period of time to pass before addressing any trouble codes could cause damage to other components.
Replacing the EGT sensor
Repairing or replacing damaged, loose or burnt EGT sensor wiring
Repairing or replacing damaged, disconnected or corroded EGT sensor connectors
Repairing or replacing any breaks in the exhaust in the location that is in front of the EGT sensor
Adding an inline resistor to the aftermarket exhaust in order to increase the back pressure
It is possible for the P2084 diagnostic trouble code to be caused by a high performance aftermarket exhaust. If this type of exhaust has been installed in the vehicle, keep this in mind.
When replacing the EGT sensor make sure you do not mistake it for the oxygen sensor. These two sensors look alike and are commonly mistaken for one another.
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