P2084
Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 2
Emissions (exhaust temperature)
Generic OBD-II
Medium
What it means
P2084 means the exhaust gas temperature (EGT) sensor 2 on bank 1 is reading outside its expected range or not tracking exhaust temperature plausibly. The engine still starts and runs, but on diesels this sensor helps manage and protect DPF regeneration, so a skewed reading can interfere with soot burn-off. It usually points to a drifting sensor or a wiring/connector problem.
Medium
Can I keep driving? The engine runs and starts normally; on diesels it can disrupt DPF regeneration, so fix it before soot accumulates.
Common symptoms
What you'll notice
- Check-engine light on
- Diesel: incomplete or missed diesel particulate filter (DPF) regeneration
- Possible reduced power if the vehicle enters a protective mode
- Often no change in how the engine drives
Common causes
Most likely first
- Faulty or out-of-range exhaust gas temperature (EGT) sensor 2 on bank 1Likely
- EGT sensor reading implausibly for the operating condition (drift/skew)Common
- Wiring or connector fault adding resistance to the sensor circuitCommon
- Heat or physical damage to the sensor or its harnessLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and compare this EGT sensor's temperature to the other exhaust sensors.
- Inspect the sensor connector and harness for corrosion, high resistance, or heat damage.
- Check the sensor's response against spec; a reading that doesn't track exhaust temperature indicates a failed sensor.
- Replace the EGT sensor if out of range, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with P2084?+
The engine drives normally, but on diesels the PCM uses this sensor to run and protect DPF regeneration. Extended driving with it faulty can cause soot buildup, so repair it soon.
Can I just clear P2084?+
It returns once the monitor runs again unless the sensor or wiring is repaired.
Related codes
Often seen with P2084
Read & clear P2084 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