Exhaust Gas Temperature Sensor 3 Bank 1 Out of Range
The P247A code indicates that the exhaust gas temperature (EGT) sensor 3 on bank 1 is reporting a temperature outside the expected range. This sensor monitors exhaust temperature to protect the catalytic converter and diesel particulate filter (DPF) from overheating. The out-of-range condition can be due to a faulty sensor, wiring issues, or actual exhaust temperature extremes.
01. Most Common Causes
- Faulty exhaust gas temperature sensor 3
- Damaged or corroded wiring/connector to sensor
- Exhaust leak near the sensor
- Engine running too hot or rich fuel mixture
02. Symptoms You Will Notice
- Check Engine Light on
- Reduced engine performance or limp mode
- Possible overheating of catalytic converter or DPF
- Increased emissions
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect EGT sensor 3 and its wiring for damage or corrosion.
Step 3: Compare sensor reading with live data; if out of range, test sensor resistance and voltage.
Step 4: Check for exhaust leaks near the sensor that could affect readings.
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 it can lead to catalytic converter or DPF damage. Short trips to a repair shop are okay.
How much does it cost to fix?▼
Replacing the sensor typically costs $150-$400 including parts and labor.