P2081
Exhaust Gas Temperature Sensor Circuit Intermittent Bank 1 Sensor 1
Exhaust gas temperature
Generic OBD-II
Low
What it means
P2081 means the signal from the exhaust gas temperature (EGT) sensor at bank 1, sensor 1 is cutting out intermittently. This sensor protects the catalyst/DPF and helps manage exhaust temperature, so the fault is about emissions monitoring rather than how the engine drives. It usually traces to a loose connector or heat-damaged wiring near the exhaust, and does not cause a stall or no-start.
Low
Can I keep driving? Safe to drive; this is an exhaust-temperature sensor signal fault and won't cause a stall or no-start, though it can affect DPF/emissions monitoring.
Common symptoms
What you'll notice
- Check-engine light on
- Usually no change in how the engine drives
- Possible impact on diesel particulate filter (DPF) regeneration
- Intermittent emissions-monitoring warnings
Common causes
Most likely first
- Loose or intermittent connector at the exhaust gas temperature (EGT) sensorLikely
- Chafed, pinched, or corroded wiring in the sensor circuitCommon
- Failing EGT sensor (bank 1, sensor 1)Common
- Heat damage to the harness near the exhaustLess often
- Faulty engine control module (ECM/PCM)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data to see when the intermittent signal occurred.
- Inspect and wiggle-test the EGT sensor connector and harness for intermittent opens, corrosion, or heat damage; repair as needed.
- Verify the sensor's ground and reference are steady in live data.
- Test the EGT sensor's resistance/signal against spec and replace it if it drops out.
- Clear the code and road-test, watching live data for signal glitches.
FAQ
Quick answers
Is it safe to drive with P2081?+
Yes. The engine runs normally, but on diesels a faulty EGT signal can disrupt DPF regeneration, so repair it before problems compound.
Can I just clear P2081?+
Being intermittent, it may stay clear briefly, then return when the glitch reoccurs. Fix the wiring or sensor for a lasting repair.
Related codes
Often seen with P2081
Read & clear P2081 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