P246F
Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 4
Exhaust gas temperature (EGT) sensor
Generic OBD-II
Low
What it means
P246F means the bank 1, sensor 4 exhaust gas temperature (EGT) sensor is reading outside its expected range or not tracking the way the ECM expects. These sensors protect and control the exhaust after-treatment, so the car still drives normally, but a bad reading can disable DPF regeneration or trigger reduced-power protection on a diesel.
Low
Can I keep driving? Yes — the car runs normally; the main risk is disabled DPF regeneration or reduced-power protection, so repair it before it affects the exhaust after-treatment.
Common symptoms
What you'll notice
- Check-engine light on
- Often no noticeable change in how the car drives
- On diesels, disabled regeneration or reduced-power protection
- Implausible exhaust-temperature reading on a scan tool
Common causes
Most likely first
- Faulty exhaust gas temperature sensor (bank 1, sensor 4)Likely
- Heat-damaged wiring or connector near the exhaustCommon
- Poor or corroded electrical connectionCommon
- Sensor reading out of range compared with the other EGT sensorsLess often
- Rarely, an ECM faultLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and compare all EGT sensor readings at key-on.
- Inspect the sensor-4 connector and harness for heat damage or chafing.
- Measure sensor resistance and compare to specification.
- Replace the EGT sensor if it reads out of range.
- Clear the code and re-test, watching the live temperature value.
FAQ
Quick answers
Is it safe to drive with P246F?+
Yes — this is a temperature-monitoring sensor, not a no-start fault. The concern is disabled DPF regeneration on diesels, so don't leave it indefinitely.
Can I just clear P246F?+
It returns once the ECM re-checks the sensor unless the sensor, wiring, or connector is repaired.
Related codes
Often seen with P246F
Read & clear P246F 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