P2483 indicates the powertrain control module has detected an implausible or out-of-range signal from the exhaust gas temperature sensor located on engine bank 1, sensor 5. The sensor’s reported temperature does not match expected exhaust conditions or the behavior of other exhaust temperature sensors, which can affect emissions monitoring and diesel particulate filter regeneration strategies.
The sensing element or internal circuitry of Bank 1 Sensor 5 can drift or fail, producing a voltage or resistance outside the expected range. This is the most common cause.
Open, shorted, corroded, or chafed wiring between the sensor and the control module can distort the signal and trigger a range/performance code.
Ambient air drawn into the exhaust stream can cool the probe locally or create temperature readings that disagree with upstream sensors.
Heavy carbon deposits can insulate the probe tip, slowing its response and causing it to read lower or lag behind actual exhaust temperatures.
A rare internal PCM fault can misinterpret a valid sensor signal; this should only be considered after the sensor, wiring, and exhaust integrity have been verified.
Short trips are usually okay, but prolonged driving is not recommended because an inaccurate exhaust temperature reading can interfere with DPF regeneration and emissions control, potentially leading to more costly damage.
Almost never. PCM failure is a rare cause of this code; in most cases the problem is the sensor, its wiring, or an exhaust issue. Replacing the PCM before verifying those items is usually a misdiagnosis.
The location varies by vehicle and exhaust configuration. It is typically the fifth exhaust gas temperature sensor in the bank 1 exhaust stream, often positioned downstream near the diesel particulate filter or SCR system. A service manual for the specific vehicle should be consulted for the exact position.
If the repair fixes the underlying fault, the code can be cleared with a scan tool and will usually stay off. It may also clear on its own after several drive cycles if the monitor runs and no longer detects the fault.