P2488
Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 5
Auxiliary emissions control
Generic OBD-II
Medium
What it means
P2488 means the bank 2, sensor 5 exhaust gas temperature sensor is reporting a value the engine computer considers implausible for current conditions. Because this sensor protects the turbo, catalyst, and particulate filter from overheating, a range/performance fault usually points to a drifting sensor, a bad connector, or damaged wiring rather than the engine itself.
Medium
Can I keep driving? The engine starts and runs normally, but the ECM may limit boost or exhaust-filter regeneration because it can't trust this temperature reading.
Common symptoms
What you'll notice
- Check-engine light on
- Temperature reading that doesn't match the other EGT sensors
- Possible reduced power or limited regeneration
- No change in idle or starting
Common causes
Most likely first
- Failing or drifting exhaust gas temperature sensor (bank 2, sensor 5)Likely
- Corroded or high-resistance connector skewing the signalCommon
- Wiring damage or poor ground near the exhaustCommon
- Soot or deposit contamination on the sensor tipLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and locate the bank 2, sensor 5 EGT sensor.
- Compare all EGT readings on a cold start; the faulty sensor reads noticeably off.
- Inspect the connector and wiring for heat damage, corrosion, or a poor ground.
- Check the signal and reference at the sensor connector against the service value.
- Replace the EGT sensor if it stays out of range with good wiring, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2488?+
Usually yes for short trips. The engine runs fine, but the ECM may cap boost or skip regeneration, so repair it before the filter clogs.
Can I just clear P2488?+
It returns once the computer sees the implausible reading again. Fix the sensor or its wiring, then clear.
Related codes
Often seen with P2488
Read & clear P2488 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