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 in Bank 2, Sensor 3. This sensor monitors exhaust temperature to protect the diesel particulate filter (DPF) and other aftertreatment components. A high circuit condition 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 temperature readings, potentially causing improper DPF regeneration or reduced engine performance.
01. Most Common Causes
- Faulty exhaust gas temperature sensor (Bank 2, Sensor 3)
- Short to voltage in the sensor wiring or connector
- Corroded or damaged sensor connector
- ECM software or hardware issue (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or limp mode
- Poor fuel economy
- DPF regeneration issues (e.g., frequent or incomplete regens)
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for related codes (e.g., P246A, P246B).
Step 2: Visually inspect the EGT sensor wiring and connector for damage, corrosion, or shorts.
Step 3: Measure the sensor voltage at the connector with the engine running; compare to manufacturer specifications (typically 0.5-4.5V).
Step 4: If voltage is high (e.g., >4.5V), disconnect the sensor and check if voltage drops; if not, suspect a short to power in the wiring.
Step 5: Test the sensor resistance at various temperatures using a multimeter; replace if out of spec.
04. Commonly Affected Makes
05. 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 improper DPF regeneration and potential damage to the exhaust system. Limp mode may also reduce drivability.
How much does it cost to fix?▼
The cost typically ranges from $150 to $300, including parts (sensor $50-$150) and labor (1-2 hours at $100-$150 per hour).