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 in bank 2, sensor 4 (downstream of the diesel particulate filter or catalytic converter). This typically means the sensor circuit has an open, short to voltage, or the sensor itself is faulty. High voltage can result from internal sensor failure, wiring issues, or a poor connection. This code is common on diesel engines with aftertreatment systems.
1. Most Common Causes
- Faulty EGT sensor Bank 2 Sensor 4 (internal open circuit)
- Sensor wiring open or shorted to battery positive (B+)
- Damaged, corroded, or disconnected sensor connector
- Internal ECM failure (rare)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel economy
- Possible regeneration issues in diesel engines
- Engine may enter limp mode
3. Step-by-Step Diagnosis
Step 1: Scan for additional codes and freeze frame data.
Step 2: Visually inspect the EGT sensor connector and wiring for damage, corrosion, or loose connections.
Step 3: Measure voltage at the sensor signal wire with the engine running; compare to manufacturer specifications.
Step 4: Test sensor resistance and compare to specs; replace if out of range.
Step 5: Clear code and test drive to see if it returns.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally not recommended to drive long distances, as the ECM may limit engine power or disable regeneration, potentially causing further damage to the exhaust system.
How much does it cost to fix?▼
The cost typically ranges from $150 to $400, including parts (sensor $50-$150) and labor (1-2 hours).
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.