P2469: Exhaust Gas Temperature Sensor Circuit High Bank 2 Sensor 3
The P2469 code indicates that the Engine Control Module (ECM) has detected a high voltage signal from the exhaust gas temperature (EGT) sensor located after the diesel particulate filter (DPF) on Bank 2, Sensor 3. This sensor monitors exhaust temperature to protect the DPF and other components. A high circuit voltage typically means the sensor signal is above the expected range, often due to a short to voltage, internal sensor failure, or wiring issues. This can lead to incorrect DPF regeneration, reduced fuel economy, and potential damage to the exhaust system.
1. Most Common Causes
- Faulty exhaust gas temperature sensor
- Short to voltage in sensor wiring or connector
- Corroded or damaged sensor connector
- ECM software or hardware issue
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel economy
- DPF regeneration issues (frequent or incomplete)
- Possible limp mode or reduced engine power
3. Step-by-Step Diagnosis
Step 1: Connect a scan tool and verify P2469 code. Check for additional related codes.
Step 2: Visually inspect the EGT sensor Bank 2 Sensor 3 wiring and connector for damage, corrosion, or shorts.
Step 3: Disconnect the sensor and measure resistance across sensor terminals; compare to manufacturer specs (typically 100-200k ohms at room temperature).
Step 4: Check voltage at the sensor connector with ignition on; should be around 5V reference. If voltage is higher, suspect a short to battery voltage.
Step 5: If sensor and wiring are okay, test the ECM by checking signal voltage at the ECM connector; if signal is high, replace the sensor. If not, ECM may be faulty.
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 cause improper DPF regeneration and potential damage to the exhaust system. Short trips to a repair shop are acceptable.
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 at $100-$150 per hour).
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.