Powertrain, generic (extended)

P2482 Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 5)

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

With P2482 the fifth bank 1 exhaust probe delivers a signal above its upper electrical limit. On GM diesels this code also covers the open circuit: the 2018 table sets it above 1400 Ω, both as a short to power with the driver off and as an interruption with the driver on, after 10 of 20 samples, Type B. The 2020 table makes it Type A. In 2025 GM uses more than 100 MΩ, or a digital value hotter than about 1290 °C, after 19 of 25 samples, again Type A with the lamp on after one trip. Ram names P2482 together with P2481 for its 2025–2026 heavy-duty diesel pick-ups. A loose plug or broken lead is therefore as likely as a failed probe. Compare with P2481 for the short to ground.

Likely causes

Loose, corroded or unplugged connector
Broken lead from heat or vibration
Probe element open or high-resistance

Symptoms

  • Warning lamp, on GM from 2020 after a single trip
  • Probe 5 shows a fixed extreme value
  • Regeneration suppressed

Repair estimate

DifficultyMediumDIY possible
Parts and labour€40–350
Time0.5–2 h

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

Parts involved

egt sensor b1s5

Related codes

P2480P2481P2483P2484P2487

References: gsi.ext.gm.com, gsi.ext.gm.com, gsi.ext.gm.com, static.nhtsa.gov.