P2487 code meaning
Exhaust Gas Temperature Sensor Circuit High (Bank 2 Sensor 5)
Powertrain system Generic code P24xx codes Check engine light
What P2487 means
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.
P2487 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2487
- Warning lamp after one trip
- Probe shows maximum or no value
Common causes of P2487
- Most likelyConnector loose or disconnected
- PossibleSignal lead shorted to a supply line
- PossibleProbe element open or high-resistance
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Egt sensor b2s5
What each part of P2487 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 4 | Area: auxiliary emission controls (catalytic converter, EGR, EVAP). |
| 87 | The exact fault in that area. |
What to do next
- Note P2487 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2487
What does P2487 mean?
P2487 means "Exhaust Gas Temperature Sensor Circuit High (Bank 2 Sensor 5)". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P2487?
Drive gently and only to a workshop. With P2487 the car can go into limp mode (reduced power) to protect itself.
Will P2487 fail an emissions test?
Yes, it can. P2487 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2487 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2487 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.