P247F
Exhaust Gas Temperature Out of Range Bank 2 Sensor 4
Auxiliary emissions (exhaust temperature)
Generic OBD-II
Medium
What it means
P247F means the exhaust gas temperature sensor on bank 2, position 4, is reporting a value the ECM considers implausible — outside the expected range or inconsistent with the other exhaust sensors. It usually points to a drifting or failing sensor or high-resistance wiring, and it can stop the DPF from regenerating properly.
Medium
Can I keep driving? Usually drivable, but the reported exhaust temperature is implausible — the ECM may block DPF regeneration or reduce power, so diagnose it soon.
Common symptoms
What you'll notice
- Check-engine light on
- Disabled or incomplete DPF regeneration
- Possible reduced power or limp mode on some diesels
- Often no noticeable change in how the car drives
Common causes
Most likely first
- Failing or drifting exhaust gas temperature sensor (bank 2, sensor 4)Likely
- Resistance in the sensor connector or wiring skewing the signalCommon
- Contaminated or aged sensor reading outside the expected windowCommon
- ECM comparing this sensor against others and finding it implausibleLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and compare this sensor's value with the other EGT sensors.
- Inspect the sensor connector and wiring for corrosion or high resistance.
- Measure sensor resistance/output against the manufacturer's temperature curve.
- Repair wiring faults, or replace the sensor if it reads out of range.
- Clear the code and confirm the reading tracks the other exhaust sensors.
FAQ
Quick answers
Is it safe to drive with P247F?+
Short term usually yes, but regeneration may be blocked and power reduced. Because it guards the DPF and catalyst temperature, repair it before long or heavy driving.
Can I just clear P247F?+
It will reappear once the ECM sees the same out-of-range value unless the sensor or its wiring is corrected.
Related codes
Often seen with P247F
Read & clear P247F 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