Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 5
The P2487 code indicates that the Engine Control Module (ECM) has detected a high voltage signal from the exhaust gas temperature (EGT) sensor located in Bank 2, Sensor 5 (downstream of the diesel particulate filter or selective catalytic reduction system). This typically means the sensor circuit has an open, short to voltage, or the sensor itself is faulty. High voltage can result from wiring issues, corrosion, or a failed sensor, leading to incorrect temperature readings that affect emissions and regeneration processes.
1. Most Common Causes
- Faulty exhaust gas temperature sensor
- Open or shorted wiring in sensor circuit
- Corroded or damaged connector
- ECM software or hardware issue
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel economy
- Possible limp mode or reduced engine power
- Failed emissions test
3. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect the EGT sensor and wiring for damage or corrosion.
Step 3: Measure sensor resistance and compare to specifications (typically 100-200k ohms at room temperature).
Step 4: Check for voltage at sensor connector (should be 5V reference from ECM).
Step 5: If sensor and wiring are okay, test ECM output or replace sensor.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause incorrect exhaust temperature readings, potentially damaging the DPF or SCR system and reducing fuel efficiency.
How much does it cost to fix?▼
The cost typically ranges from $150 to $350, including parts (sensor $50-$150) and labor (1-2 hours at $100-$200 per hour).
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.