Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 4
The P2474 code indicates that the Engine Control Module (ECM) has detected a performance or range issue with the exhaust gas temperature (EGT) sensor located on Bank 2, Sensor 4. This sensor monitors exhaust temperature to protect the diesel particulate filter (DPF) and other emissions components. The ECM compares the sensor's signal to expected values; if the signal is out of range or the sensor response is slow, the code sets. Common causes include a faulty sensor, wiring issues, or exhaust leaks near the sensor.
01. Most Common Causes
- Faulty exhaust gas temperature sensor
- Damaged or corroded wiring/connector
- Exhaust leak near the sensor
- ECM software or calibration issue
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine performance or limp mode
- Increased exhaust emissions
- Possible DPF regeneration issues
03. 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: Compare sensor resistance and voltage readings to manufacturer specifications.
Step 4: Check for exhaust leaks near the sensor.
Step 5: If all else is normal, replace the EGT 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 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?▼
The cost typically ranges from $50 to $150 for the sensor part, plus labor if you have it installed professionally.