Exhaust Gas Temperature Sensor Out of Range Bank 2 Sensor 3
The P247E code indicates that the exhaust gas temperature (EGT) sensor for Bank 2, Sensor 3 is reporting a value outside the expected range. This sensor monitors the temperature of exhaust gases to protect the diesel particulate filter (DPF) and catalytic converter from overheating. An out-of-range reading can be caused by a faulty sensor, wiring issues, or actual exhaust temperature extremes. If the sensor fails, the engine control module (ECM) may limit engine power or trigger regeneration issues.
1. Most Common Causes
- Faulty or degraded EGT sensor 3 (Bank 2)
- Short to ground, short to voltage, or open circuit in the sensor wiring or connectors
- Exhaust leak near the sensor affecting temperature readings
- Excessive soot or ash buildup on the sensor tip
- Internal PCM failure (rare)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or limp mode
- Poor fuel economy
- DPF regeneration issues or frequent regeneration
3. Step-by-Step Diagnosis
Step 1: Scan for additional codes and record freeze frame data.
Step 2: Visually inspect the EGT sensor and wiring for damage or corrosion.
Step 3: Compare sensor readings with a scan tool to known good values at idle and under load.
Step 4: Test sensor resistance and voltage per manufacturer specifications.
Step 5: Check for exhaust leaks near the sensor location.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can lead to DPF damage or reduced engine performance. Short trips to a repair shop are acceptable.
How much does it cost to fix?▼
Replacing the sensor typically costs $150-$400 including parts and labor, depending on vehicle make and labor rates.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.