OBD-II Generic Error Code P2085: How to Fix It

Q: Can I drive with error code P2085?

You can drive short distances, but the code indicates an intermittent issue that may affect engine performance or emissions. It's best to diagnose and fix it promptly to avoid potential damage to the catalytic converter or DPF.

Q: What does Bank 1 Sensor 2 mean?

Bank 1 refers to the side of the engine containing cylinder #1. Sensor 2 is the downstream sensor, located after the catalytic converter or DPF. In this case, it measures exhaust gas temperature.

Q: How much does it cost to replace an exhaust gas temperature sensor?

The part itself typically costs between $30 and $120, depending on the vehicle. Labor can add $50–$150 if you have a mechanic do it. DIY can save on labor costs.

Q: Will a bad EGT sensor cause check engine light to come on?

Yes, P2085 directly sets the check engine light (MIL). The intermittent nature may cause the light to flicker or stay on.

Q: Can I clean an exhaust gas temperature sensor instead of replacing it?

No, EGT sensors are not designed to be cleaned. Replacement is the only reliable fix if the sensor is faulty.

Abstract

Error code P2085 indicates an intermittent signal from the exhaust gas temperature sensor on Bank 1, Sensor 2 (downstream of the diesel particulate filter or catalytic converter). This usually points to a faulty sensor, wiring issue, or exhaust leak that causes temperature fluctuations.