P2473
Exhaust Gas Temperature Sensor Circuit Bank 2 Sensor 4
Exhaust temperature (emissions)
Generic OBD-II
Medium
What it means
P2473 means the engine computer sees a circuit fault in the exhaust gas temperature (EGT) sensor for bank 2, sensor 4. These sensors track exhaust heat to protect the catalyst and particulate filter and to time regeneration, so the code points to a sensor or wiring problem rather than a mechanical engine fault.
Medium
Can I keep driving? The car will usually still drive, but exhaust-temperature monitoring is unreliable, which can disrupt DPF regeneration and may trigger reduced power on some vehicles.
Common symptoms
What you'll notice
- Check-engine light on
- Possible reduced power or limp mode on diesels during regeneration
- Failed or incomplete DPF/catalyst regeneration cycles
- Often no noticeable change in how the car drives
Common causes
Most likely first
- Faulty exhaust gas temperature (EGT) sensor on bank 2, sensor 4Likely
- Open or short in the EGT sensor wiringCommon
- Corroded or loose sensor connectorCommon
- Heat-damaged wiring routed near the exhaustLess often
- Rarely, an ECM faultLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and find the bank 2 / sensor 4 EGT sensor in the exhaust.
- Inspect the connector and wiring for heat damage, corrosion, or breaks.
- Measure the sensor's resistance and signal against the manufacturer's spec.
- Repair or replace damaged wiring and connectors first.
- Replace the EGT sensor if it's faulty with good wiring, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2473?+
Usually yes for short trips, but the sensor protects the exhaust and controls regeneration, so repair it before extended or heavy-load driving.
Can I just clear P2473?+
It comes back until the sensor or wiring is repaired. Clearing only resets the light.
Related codes
Often seen with P2473
Read & clear P2473 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