Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 5
The P2486 code indicates that the exhaust gas temperature (EGT) sensor circuit for Bank 2, Sensor 5 is reading a voltage lower than the expected range. This sensor monitors exhaust temperature to protect the diesel particulate filter (DPF) and other emissions components. A low circuit condition can be caused by a faulty sensor, wiring issues, or a short to ground. This can lead to incorrect temperature readings, potentially causing regeneration issues or emissions system damage.
1. Most Common Causes
- Faulty exhaust gas temperature sensor
- Short to ground in sensor wiring or connector
- Corroded or damaged sensor connector
- Open circuit in sensor signal wire
- Engine control module (ECM) failure (rare)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced fuel economy
- DPF regeneration issues (frequent or incomplete regen)
- Possible limp mode activation
- Excessive exhaust smoke
3. Step-by-Step Diagnosis
Step 1: Connect an OBD2 scanner and confirm code P2486. Check for additional codes.
Step 2: Visually inspect the EGT sensor Bank 2 Sensor 5 wiring and connector for damage, corrosion, or loose connections.
Step 3: Using a multimeter, measure the sensor's resistance and compare to manufacturer specifications. Also check for short to ground or open circuit.
Step 4: If wiring and connector are okay, replace the EGT sensor.
Step 5: Clear codes and test drive to verify repair.
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 experience limp mode.
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 location.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.