Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 4
The P2476 code indicates that the Engine Control Module (ECM) has detected a high voltage signal from 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 catalytic converter. A high circuit condition typically means the sensor signal is above the expected range, often due to a short to voltage, open circuit, or faulty sensor. This can lead to incorrect temperature readings, affecting emissions and regeneration cycles.
01. Most Common Causes
- Faulty exhaust gas temperature sensor
- Short to voltage in sensor wiring or connector
- Open circuit in sensor wiring
- Corroded or damaged connector
- ECM software or hardware issue
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel economy
- Decreased engine performance
- DPF regeneration issues
- Possible limp mode activation
03. 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 wiring and connector for damage, corrosion, or loose connections.
Step 3: Measure sensor resistance and compare to manufacturer specifications; replace if out of range.
Step 4: Check for short to voltage by testing circuit with a multimeter; repair wiring as needed.
Step 5: Clear the code and test drive to see if it returns; if persistent, replace 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 it can cause DPF damage and reduced performance. Short trips may be okay, but immediate diagnosis is advised.
How much does it cost to fix?▼
The cost typically ranges from $150 to $300, including parts and labor. The sensor itself costs $50-$150, and labor adds $50-$150.