Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 5
The P2482 code indicates that the Engine Control Module (ECM) has detected a high voltage signal from the exhaust gas temperature (EGT) sensor located in Bank 1, Sensor 5 (typically downstream of the diesel particulate filter or selective catalytic reduction system). This high voltage reading suggests a short to power, open circuit, or a faulty sensor. The EGT sensor is critical for monitoring exhaust temperatures to protect the catalytic converter and DPF, and to optimize regeneration cycles. A high circuit condition can lead to incorrect temperature readings, potentially causing reduced engine performance, increased emissions, or damage to exhaust components.
1. Most Common Causes
- Faulty exhaust gas temperature (EGT) sensor (Bank 1, Sensor 5) with high internal resistance
- Open circuit or short to battery voltage (B+) in the EGT sensor signal circuit
- Damaged, loose, or corroded EGT sensor connector
- Wiring harness damaged by excessive exhaust heat
- Internal PCM failure (rare)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or limp mode
- Poor fuel economy
- Increased exhaust emissions
- Possible DPF regeneration issues
3. Step-by-Step Diagnosis
Step 1: Connect a scan tool and verify the code P2482. Check for additional related codes.
Step 2: Visually inspect the EGT sensor (Bank 1, Sensor 5) and its wiring for damage, corrosion, or loose connections.
Step 3: Disconnect the sensor and measure resistance across its terminals. Compare with manufacturer specifications (typically 100-200 kΩ at room temperature).
Step 4: Check for voltage at the sensor connector with the ignition on. The signal wire should read around 0.5-4.5V; a reading near 5V indicates a short to power.
Step 5: If wiring and sensor appear okay, test the ECM output by backprobing the connector. Replace the sensor if all tests point to it.
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 incorrect exhaust temperature readings, potentially causing damage to the DPF or catalytic converter. Short trips to a repair shop are generally acceptable.
How much does it cost to fix?▼
The cost typically ranges from $150 to $400, including parts and labor. The sensor itself costs $50-$150, and labor adds $100-$250 depending on accessibility.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.