Powertrain, generic (extended)

P2483 Exhaust Gas Temperature Sensor Circuit Range/Performance (Bank 1 Sensor 5)

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

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.

Likely causes

Probe not fully seated in its boss after exhaust work
Probe output stuck or responding too slowly
Heavily sooted probe tip insulating the element

Symptoms

  • Warning lamp after two trips
  • Probe 5 barely changes while the other probes heat up

Repair estimate

DifficultyMediumDIY possible
Parts and labour€40–400
Time0.5–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

egt sensor b1s5

Related codes

P2480P2481P2482P2484P2488

References: gsi.ext.gm.com, static.nhtsa.gov, law.cornell.edu.