P2086: Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 2
The P2086 code indicates that the Engine Control Module (ECM) has detected a malfunction in the exhaust gas temperature (EGT) sensor circuit for Bank 2, Sensor 2. This sensor is located downstream of the diesel particulate filter (DPF) or catalytic converter, depending on the vehicle. The ECM monitors the sensor's voltage and compares it to expected values; if the signal is out of range or the sensor response is slow, this code sets. Common causes include a faulty EGT sensor, wiring issues, exhaust leaks, or a restricted DPF.
01. Most Common Causes
- Faulty exhaust gas temperature sensor
- Damaged or corroded wiring/connectors
- Exhaust system leaks
- Restricted or clogged DPF or catalytic converter
- ECM software issues
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine performance or power
- Increased fuel consumption
- Possible regeneration issues in diesel vehicles
- Exhaust odor or smoke
03. Step-by-Step Diagnosis
Step 1: Connect a scan tool and verify the code. Check for additional codes related to EGT sensors.
Step 2: Visually inspect the EGT sensor and wiring for damage, corrosion, or loose connections.
Step 3: Use a multimeter to test the sensor's resistance and compare to manufacturer specifications.
Step 4: Check for exhaust leaks near the sensor location.
Step 5: If all else is okay, replace the EGT sensor and clear the code.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally not recommended to drive long distances with this code, as it can lead to reduced performance, increased emissions, and potential damage to the DPF or catalytic converter. Have it diagnosed promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for the sensor part, plus labor if you have a mechanic replace it. DIY replacement can save on labor costs.