P2466: Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 3
The P2466 code indicates a problem with the exhaust gas temperature (EGT) sensor circuit for Bank 2, Sensor 3. This sensor monitors the temperature of the exhaust gases to help the engine control module (ECM) optimize diesel particulate filter (DPF) regeneration and protect the engine from overheating. The code is set when the ECM detects an electrical fault, such as an open or short circuit, in the sensor's wiring or the sensor itself.
1. Most Common Causes
- Faulty exhaust gas temperature sensor
- Open or shorted wiring in the sensor circuit
- Corroded or damaged connector
- ECM software or hardware issue
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel efficiency
- Possible DPF regeneration issues
- Engine may enter limp mode
3. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for related codes.
Step 2: Visually inspect the EGT sensor and its wiring for damage, corrosion, or loose connections.
Step 3: Test the sensor's resistance and voltage using a multimeter and compare to manufacturer specifications.
Step 4: If the sensor and wiring are okay, check the ECM for faults or update the software.
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 damage or engine overheating. Short trips to a repair shop are generally okay.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for parts and labor, 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.