Powertrain, generic (extended)

P2487 Exhaust Gas Temperature Sensor Circuit High (Bank 2 Sensor 5)

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

With P2487 the control unit sees the fifth bank 2 exhaust probe above its upper electrical limit, the picture of a short to supply voltage or, on many designs, of an open circuit. There is no public maker document for P2487. For bank 1 GM treats probe 5 under P2482: above 1400 Ω in the 2018 tables, beyond 100 MΩ or about 1290 °C in 2025, rated Type A since 2020, so the lamp comes on after one trip. CARB requires out-of-range high detection for each input of this kind. Since a pulled connector produces the same reading as a dead probe, check the plug before buying parts; a probe that reads plausibly at ambient temperature after reconnection points to the harness. Low: P2486; bank 1: P2482.

Likely causes

Connector loose or disconnected
Signal lead shorted to a supply line
Probe element open or high-resistance

Symptoms

  • Warning lamp after one trip
  • Probe shows maximum or no value

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 b2s5

Related codes

P2482P2485P2486P2488P2489

References: law.cornell.edu, gsi.ext.gm.com, gsi.ext.gm.com.