Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 3
The P2468 code indicates that the Engine Control Module (ECM) has detected a low voltage condition in the exhaust gas temperature (EGT) sensor circuit for Bank 2, Sensor 3. This sensor is typically located downstream of the diesel particulate filter (DPF) or in the exhaust system after the catalytic converter. The low voltage reading suggests a short to ground, a faulty sensor, or a wiring issue. This can affect the regeneration process of the DPF and may lead to increased emissions or reduced engine performance.
1. Most Common Causes
- Faulty exhaust gas temperature sensor
- Short to ground in the sensor wiring or connector
- Corroded or damaged sensor connector
- ECM software or hardware issue (rare)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel efficiency
- Possible limp mode or reduced engine power
- DPF regeneration issues (frequent or incomplete regeneration)
3. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for related codes (e.g., P2463, P2464).
Step 2: Visually inspect the EGT sensor Bank 2 Sensor 3 wiring and connector for damage, corrosion, or loose connections.
Step 3: Measure the sensor resistance and compare to manufacturer specifications; a short circuit (low resistance) indicates a faulty sensor.
Step 4: Check for a short to ground by disconnecting the sensor and measuring voltage at the harness connector (should be ~5V reference).
Step 5: If wiring and sensor are okay, test the ECM output or consult a professional for further diagnosis.
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 DPF clogging, reduced performance, and potential engine damage. You may be able to drive short distances, but have it diagnosed as soon as possible.
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 is about $100-$250 depending on the vehicle and shop rates.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.