P2085: Exhaust Gas Temperature Sensor Circuit Intermittent Bank 1 Sensor 2
The P2085 code indicates an intermittent fault in the exhaust gas temperature (EGT) sensor circuit for Bank 1, Sensor 2. This sensor monitors exhaust temperature to protect the catalytic converter and DPF. An intermittent signal can cause the ECM to trigger a check engine light and potentially affect emissions and engine performance.
1. Most Common Causes
- Faulty EGT sensor
- Damaged wiring or connector
- Corrosion in sensor connector
- Exhaust leak near sensor
2. Symptoms You Will Notice
- Check Engine Light on
- Reduced engine performance
- Increased fuel consumption
- Possible limp mode activation
3. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect EGT sensor wiring and connector for damage or corrosion.
Step 3: Test sensor resistance and compare to manufacturer specs.
Step 4: Check for exhaust leaks near the sensor.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally safe for short trips, but prolonged driving may cause catalytic converter or DPF damage. Have it diagnosed promptly.
How much does it cost to fix?▼
Typically $50-$150 for sensor replacement, plus diagnostic fees if done by a shop.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.