P2487Exhaust Gas Temperature Sensor Circuit High (Bank 2 Sensor 5)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- 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.
- What you may notice
- Warning lamp after one trip
- Probe shows maximum or no value
- Likely causes
- LikelyConnector loose or disconnected
- PossibleSignal lead shorted to a supply line
- PossibleProbe element open or high-resistance
- 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 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.