P247D: Exhaust Gas Temperature Out of Range Bank 2 Sensor 2

What it means

The EGT sensor at bank 2 sensor 2 reports a value outside its plausible operating range over time - typically a degraded element giving an offset that the substitute logic flags as implausible.

At a glance

• Usually lights the check-engine light
• Affects emissions; the car can fail an emissions test

How it works

Bank 2 sensor 2 measures exhaust gas temperature at its location in the bank 2 exhaust, and the control module checks whether the reading is plausible against operating conditions and related sensor readings. P247D sets when bank 2 sensor 2 remains outside its expected range, which can result from a biased sensor, circuit damage, contamination, or a nearby exhaust leak.

Common causes

Most likely first.

1. Aged or biased exhaust-temperature sensor
2. Damaged wiring or poor connector contact
3. Sensor contaminated or damaged
4. Exhaust leak near the sensor

Symptoms

• Check-engine light on
• Possible reduced engine power
• Possible increased fuel consumption

How to diagnose it

1. Record freeze-frame data and compare bank 2 sensor 2's reading with bank 2 sensor 1 and other available exhaust temperature readings.
2. With the exhaust cool, inspect bank 2 sensor 2's connector and harness for corrosion, loose contact, heat damage, or contamination.
3. Inspect the exhaust around bank 2 sensor 2 for a leak that could affect its local reading.
4. Review live data from warm-up through changing load and compare sensor 2's response with other sensors.
5. Test bank 2 sensor 2 and its wiring against the manufacturer's specification before replacing the sensor.

Common fixes

• Repair poor connector contact or damaged wiring at bank 2 sensor 2.
• Repair an exhaust leak near bank 2 sensor 2.
• Replace a contaminated or damaged bank 2 sensor 2.
• Replace bank 2 sensor 2 if it fails testing after the circuit has been checked.

Can I keep driving?

If the vehicle behaves normally, limit driving to necessary trips while arranging repair. Avoid heavy loads if reduced power appears, since emissions management and fuel consumption may be affected.