Exhaust Gas Temperature Sensor Out of Range Bank 2 Sensor 1
The P247C code indicates that the exhaust gas temperature (EGT) sensor located before the catalytic converter on Bank 2 (the side of the engine opposite cylinder #1) is reporting a temperature reading outside the expected range. This sensor monitors exhaust temperature to protect the catalytic converter and diesel particulate filter (if equipped) from overheating. An out-of-range reading can be caused by a faulty sensor, wiring issues, or actual exhaust temperature extremes due to engine misfires or rich fuel conditions.
1. Most Common Causes
- Faulty exhaust gas temperature sensor
- Damaged or corroded wiring/connector to the sensor
- Exhaust leak near the sensor
- Engine misfire or rich fuel mixture causing excessive exhaust temperatures
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine performance or fuel economy
- Possible limp mode activation
- Overheating of catalytic converter or DPF
3. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional codes.
Step 2: Visually inspect the EGT sensor and its wiring for damage, corrosion, or loose connections.
Step 3: Compare the sensor's resistance and voltage readings to manufacturer specifications using a multimeter.
Step 4: Monitor live data from the sensor to see if the temperature reading is erratic or stuck.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances with this code, as it can lead to catalytic converter or DPF damage. Short trips to a repair shop are acceptable.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for the sensor part, plus labor if you have a mechanic replace it. DIY replacement can save on labor costs.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.