Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 4
The P246E code indicates a problem with the exhaust gas temperature (EGT) sensor circuit for Bank 1, Sensor 4. This sensor monitors the temperature of exhaust gases, typically located after the diesel particulate filter (DPF) or selective catalytic reduction (SCR) system. The Engine Control Module (ECM) detects an electrical fault in the sensor circuit, such as an open, short, or out-of-range signal. This can affect emissions control and DPF regeneration processes.
01. 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
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel efficiency
- Possible DPF regeneration issues
- Decreased engine performance
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and freeze frame data.
Step 2: Visually inspect the EGT sensor and wiring for damage or corrosion.
Step 3: Test sensor resistance and compare to manufacturer specifications.
Step 4: Check for voltage and ground at the sensor connector using a multimeter.
Step 5: If wiring and sensor are okay, test the ECM output or replace the sensor.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally safe to drive short distances, but prolonged driving may cause DPF clogging or reduced fuel economy. It's best to diagnose and repair promptly.
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 location and vehicle.