Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 4
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.
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.
Real-world scan data
Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.
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?+
Can I just clear P246F?+
Related codes
Read & clear P246F yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.