P2483Exhaust Gas Temperature Sensor Circuit Range/Performance (Bank 1 Sensor 5)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2483 is the plausibility test for the fifth bank 1 exhaust probe: the circuit is electrically fine, but the reading does not behave like a real exhaust temperature. GM's 2025 diesel tables describe the check in detail. After the engine has been off for more than 10,800 s (three hours), the value frozen at key-on serves as reference; if the probe then fails to rise by the amount a calibrated map expects while the engine runs, the ECM concludes it is stuck or no longer in the gas stream. It is a Type B fault and waits until the electrical codes P2481, P2482 and P2484 are clear. Hino also issued workshop-manual corrections for P2483 on its 2018–2019 J08E trucks. A probe pulled out of its boss after work on the exhaust is a classic cause.
- What you may notice
- Warning lamp after two trips
- Probe 5 barely changes while the other probes heat up
- Likely causes
- LikelyProbe not fully seated in its boss after exhaust work
- PossibleProbe output stuck or responding too slowly
- RareHeavily sooted probe tip insulating the element
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €40 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.