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 exhaust gases to protect the diesel particulate filter (DPF) and other aftertreatment components. The code is set when the powertrain control module (PCM) detects a voltage or resistance signal from the sensor that is out of the expected range, often due to a faulty sensor, wiring issues, or connector problems.
01. Most Common Causes
- Faulty exhaust gas temperature sensor
- Damaged or corroded wiring/connectors
- Short circuit or open circuit in the sensor circuit
- PCM software or hardware issue (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine performance or limp mode
- Increased fuel consumption
- Possible DPF regeneration issues
03. 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: Measure the sensor's resistance and compare to manufacturer specifications.
Step 4: Check the sensor's voltage signal with a multimeter while the engine is running.
Step 5: If the sensor and wiring are okay, test the PCM output and consider reprogramming or replacement.
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 DPF damage or reduced engine performance. 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 the vehicle.