P2466
Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 3
Exhaust temperature / emissions
Generic OBD-II
Medium
What it means
P2466 flags a fault in the exhaust gas temperature (EGT) sensor circuit for bank 2, sensor 3. EGT sensors track exhaust temperature to protect the turbo, catalytic converter, and — on diesels — the particulate filter. With this circuit faulted the ECM loses a reliable reading and may limit performance or regeneration, but the engine itself normally keeps running.
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, disabled or incomplete particulate-filter (DPF) regeneration
- Occasionally cooling-fan running longer or emissions-related warnings
Common causes
Most likely first
- Faulty exhaust gas temperature (EGT) sensorLikely
- Open or short in the EGT sensor wiringCommon
- Corroded or loose connector at the sensorCommon
- Heat damage to the harness near the exhaustLess often
- Rarely, an ECM faultLess often
How to diagnose & fix
Work through it in order
- Scan for codes and record freeze-frame data.
- Inspect the EGT sensor connector and wiring near the exhaust for heat or corrosion damage.
- Measure the sensor's resistance or signal voltage and compare against specification.
- Check wiring continuity back to the ECM.
- Replace the EGT sensor if it is out of spec, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2466?+
Usually yes short-term, but the ECM may cut power or skip diesel-filter regeneration, so get it repaired before soot builds up.
Can I just clear P2466?+
It will come back until the sensor or its wiring is repaired.
Related codes
Often seen with P2466
Read & clear P2466 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