P247A
Exhaust Gas Temperature Out of Range Bank 1 Sensor 3
Exhaust temperature / emissions
Generic OBD-II
Medium
What it means
P247A means the exhaust gas temperature reading from bank 1, sensor 3 is outside the plausible range — the ECM sees a value that doesn't match current operating conditions. EGT sensors protect the turbo, catalyst, and diesel particulate filter, so an out-of-range reading can limit performance or disrupt regeneration even though the engine still runs.
Medium
Can I keep driving? Usually drivable, but the ECM may limit power or diesel-filter regeneration to protect the exhaust — have it checked soon.
Common symptoms
What you'll notice
- Check-engine light on
- Reduced power or limp mode in some vehicles
- On diesels, disrupted particulate-filter (DPF) regeneration
- Emissions-related warnings
Common causes
Most likely first
- Aged or drifting exhaust gas temperature (EGT) sensor reading out of rangeLikely
- Corrosion or added resistance in the sensor wiring or connectorCommon
- Exhaust leak near the sensor skewing the temperature it seesCommon
- Faulty EGT sensorLess often
- Rarely, an ECM faultLess often
How to diagnose & fix
Work through it in order
- Scan and compare EGT readings across sensors in freeze-frame and live data.
- Inspect the sensor connector and wiring for corrosion or damage.
- Check for an exhaust leak near the sensor that could distort the reading.
- Measure the sensor against a known temperature and compare to specification.
- Replace the EGT sensor if its reading is out of range, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P247A?+
Usually yes short-term, but the ECM may cut power or interrupt diesel-filter regeneration, so get it checked soon.
Can I just clear P247A?+
It will reset once the sensor sends a plausible reading again, but returns until the drifting sensor or wiring is fixed.
Related codes
Often seen with P247A
Read & clear P247A yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX