Exhaust Gas Temperature Sensor Out of Range Bank 2 Sensor 4
The P247F code indicates that the exhaust gas temperature (EGT) sensor located after the diesel particulate filter (DPF) on Bank 2, Sensor 4, is reporting a temperature reading outside the expected range. This sensor monitors exhaust temperature to protect the DPF and other components from overheating. An out-of-range reading can be caused by a faulty sensor, wiring issues, or actual exhaust temperature extremes due to regeneration problems or engine misfires.
01. Most Common Causes
- Faulty exhaust gas temperature sensor
- Damaged or corroded wiring/connector to sensor
- Exhaust leak near the sensor
- DPF regeneration issues causing extreme temperatures
- Engine misfire or fuel imbalance
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine performance or limp mode
- Increased fuel consumption
- Possible DPF regeneration issues
- Excessive exhaust smoke
03. 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 according to manufacturer specifications.
Step 5: Check for exhaust leaks upstream of the sensor.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as the engine may enter limp mode, and continued driving could damage the DPF or catalytic converter.
How much does it cost to fix?▼
Replacing the sensor typically costs $150-$400 including parts and labor, but additional repairs for wiring or exhaust issues may increase the cost.