P247E: Exhaust Gas Temperature Out of Range Bank 2 Sensor 3

What it means

The EGT sensor at bank 2 sensor 3 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 3 measures exhaust gas temperature at its location in the bank 2 exhaust, and the control module monitors whether that reading is plausible. P247E sets when bank 2 sensor 3 remains outside the expected range, which may point to a biased or damaged sensor, poor wiring or connection, contamination, or a leak near sensor 3.

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. Check freeze-frame data and compare bank 2 sensor 3's reading with the other exhaust temperature sensors under similar operating conditions.
2. With the exhaust cool, inspect the bank 2 sensor 3 connector, wiring, and sensor area for heat damage, corrosion, loose contact, or contamination.
3. Look for an exhaust leak near the bank 2 sensor 3 mounting point.
4. Monitor live data through warm-up and changing load to see whether bank 2 sensor 3 responds plausibly relative to other sensors.
5. Test the bank 2 sensor 3 circuit and sensor against the manufacturer's specification before replacement.

Common fixes

• Repair damaged wiring or poor contact at the bank 2 sensor 3 connector.
• Repair an exhaust leak near bank 2 sensor 3.
• Replace a contaminated or damaged bank 2 sensor 3.
• Replace bank 2 sensor 3 if it remains out of specification after circuit checks.

Can I keep driving?

If the vehicle runs normally, short necessary trips are generally reasonable while you arrange diagnosis. Avoid heavy loads if power is reduced, since the fault may affect emissions control and fuel economy.