P2474
Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 4
Auxiliary emissions control
Generic OBD-II
Medium
What it means
P2474 means the bank 2, sensor 4 exhaust gas temperature sensor is reading a value the engine computer considers implausible for current conditions. This sensor guards the turbo, catalyst, and particulate filter against overheating, so a range/performance fault typically comes from a drifting sensor, a bad connector, or damaged wiring rather than the engine itself.
Medium
Can I keep driving? The engine starts and runs, but the ECM may limit boost or exhaust-filter regeneration because the temperature reading is out of its expected range.
Common symptoms
What you'll notice
- Check-engine light on
- Temperature reading that doesn't track the other EGT sensors
- Possible reduced power or limited regeneration
- No change in starting or idle quality
Common causes
Most likely first
- Failing or drifting exhaust gas temperature sensor (bank 2, sensor 4)Likely
- Corroded or high-resistance connector skewing the signalCommon
- Wiring damage or a poor ground shifting the reading out of rangeCommon
- Sensor contaminated by soot or exhaust depositsLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and identify the bank 2, sensor 4 EGT sensor.
- Compare all EGT sensor readings on a cold start; the faulty one reads noticeably off from the rest.
- Inspect the connector and wiring for corrosion, heat damage, or a poor ground.
- Check the signal and reference at the sensor connector against the service value.
- Replace the EGT sensor if the reading stays out of range with good wiring, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2474?+
Usually yes short term. The engine runs normally, but the ECM may cap boost or skip regeneration to protect the exhaust, so repair it before it snowballs into a clogged filter.
Can I just clear P2474?+
It returns once the ECM sees the out-of-range reading again. Fix the sensor or its wiring, then clear.
Related codes
Often seen with P2474
Read & clear P2474 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