P2475
Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 4
Auxiliary emissions (exhaust temperature)
Generic OBD-II
Medium
What it means
P2475 means the exhaust gas temperature sensor on bank 2, position 4, is reading an abnormally low voltage — typically a short to ground, wiring fault, or failed sensor. These sensors let the ECM watch exhaust heat during DPF regeneration and protect the catalyst, so a bad signal can disable regen or trigger reduced power.
Medium
Can I keep driving? Usually drivable, but this sensor protects the DPF and catalyst during regeneration — get it fixed so the ECM can manage exhaust temperature correctly.
Common symptoms
What you'll notice
- Check-engine light on
- Disabled or incomplete DPF regeneration
- Possible reduced power or limp mode on some diesels
- No obvious drivability change in many cases
Common causes
Most likely first
- Faulty exhaust gas temperature sensor (bank 2, sensor 4)Likely
- Signal wire shorted to ground giving a low readingCommon
- Corroded or damaged sensor connectorCommon
- Open or chafed wiring in the sensor circuitLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and confirm the low-circuit reading on bank 2 sensor 4.
- Locate the correct EGT sensor and inspect its connector and wiring near the hot exhaust.
- Check for a short to ground and measure sensor resistance against spec.
- Repair damaged wiring or connectors.
- Replace the exhaust gas temperature sensor if it is out of spec, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2475?+
Generally yes short term, but the ECM may block DPF regeneration or reduce power. Fix it soon so exhaust temperature is monitored properly during regen.
Can I just clear P2475?+
It returns quickly if the sensor or wiring is faulty, since the ECM checks this circuit continuously.
Related codes
Often seen with P2475
Read & clear P2475 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