P2081 trouble code definition
Exhaust Gas Temperature Sensor Circuit Intermittent Bank 1 Sensor 1
What the P2081 code means
P2081 is an OBD-II generic code for the exhaust gas temperature sensor circuit signal is intermittent for bank 1 sensor 1 to the engine control module (ECM). This means the sensor signal voltage signal return is intermittent within specification.
What causes the P2081 code?
The engine control module signal return for the exhaust temperature sensor in bank 1 sensor 1 is not giving a steady reading output. The signal is within specifications when it is working properly.
The ECM turns on the Check Engine Light if the ECM detects a voltage return that is erratic or not giving a steady voltage return.
The wiring or connection to the sensor is loose or making poor contact.
What are the symptoms of the P2081 code?
The Check Engine Light will be illuminated and the code is set in ECM memory as a fault.
The engine fault may be the P2081 code and also the particulate filter light may be illuminated.
How does a mechanic diagnose the P2081 code?
Scans codes and documents the code in the ECM
Diagnoses the code as per the manufacturer's pinpoint test to verify the sensor signal
Checks the sensor connection for loose or corroded terminals
Disconnects the sensor and sees if the voltage of the sensor is steady compared to the scanner readings received through the ECM
Common mistakes when diagnosing the P2081 code?
Clearing ECM memory codes before checking the freeze frame data of the failure
Failing to clear ECM codes after the P2081 codes are fixed
Replacing the sensor when the connector has corrosion in the connections
How serious is the P2081 code?
Code P2081 is an indication that the sensor or connector may need serviced and/or repaired. The sensor is the most common cause of erratic signals.
What repairs can fix the P2081 code?
Replacing the sensor after the connection is cleaned of any corrosion
Repairing the wiring or connection to the exhaust temperature sensor assembly
Replacing the ECM for an erratic circuit in the ECM temperature sensor circuit
Additional comments for consideration regarding the P2081 code
Code P2081 can be generated from loose wire connections from a harness that is not secured and the connection is allowed to flex excessively.
Need help with a P2081 code?
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