What Does P2487 Mean?
The PCM detected an abnormally high voltage signal from the exhaust gas temperature sensor at Bank 2, Sensor 5. The sensor voltage exceeds the expected operating range, suggesting a short to voltage or open sensor ground.
Common Causes
35%
Open or damaged sensor ground circuit
25%
Wiring harness short to voltage/power
25%
Failed EGT sensor with internal open circuit
10%
Corroded or loose connector causing high resistance
5%
PCM sensor circuit internal fault
Diagnostic Steps
1
Step 1: Check sensor ground circuit continuity and resistance to chassis/engine ground (should be less than 1 ohm)
2
Step 2: Disconnect sensor and measure voltage at harness connector; should drop to near 0V if short to power exists
3
Step 3: Inspect wiring for contact with hot wire sources or damaged insulation near high voltage circuits
4
Step 4: Test sensor operation by measuring resistance while heating with propane torch (resistance should decrease)
5
Step 5: Verify PCM reference voltage output is within specification (typically 5V) with sensor disconnected
Estimated Repair Cost
$150 - $700
Parts + labor, varies by vehicle and location
The PCM detected an abnormally high voltage signal from the exhaust gas temperature sensor at Bank 2, Sensor 5. The sensor voltage exceeds the expected operating range, suggesting a short to voltage or open sensor ground.
The most common cause of P2487 (Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 5) is: Open or damaged sensor ground circuit
Typical repair costs for P2487 range from $150 to $700, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle remains drivable but exhaust system temperature monitoring is compromised. Risk of overheating catalytic converter or DPF without proper temperature feedback.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2487 to identify the root cause.
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Quick Info
Category
Powertrain
System
Emissions Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
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