P2081 code meaning
Exhaust Gas Temperature Sensor Circuit Intermittent (Bank 1 Sensor 1)
Powertrain system Generic code P20xx codes Check engine light
What P2081 means
P2081 is set when the signal of exhaust temperature sensor 1 on bank 1 jumps between consecutive readings faster than real exhaust gas can change. GM documents two versions. A diesel in table 18OBDG04 flags a change of more than 10 ohms between two samples taken 100 ms apart and needs 20 such failures out of 40. The 3.0 L LZO (25OBDG04B) looks at the raw temperature step instead, more than 100 °C, in 12 of 25 samples. Both are Type B, so the lamp lights after the second faulty trip. Infiniti lists P2081 with its siblings on the Q50 of 2016–2017 and the Q60 of 2017 (VR30DDTT) and fixes it by reprogramming the ECM. Ford's 2014 gasoline code list carries it without a lamp marker. Loose contacts and heat-damaged leads are the classic causes; a steady but wrong value would be P2080.
P2081 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 1.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2081
- Engine warning lamp on, sometimes only after the second trip
- Exhaust temperature value jumping in live data
- Regeneration or turbo protection strategy interrupted
Common causes of P2081
- Most likelyLoose or corroded pin in the sensor connector
- PossibleSensor lead chafed or embrittled by exhaust heat, breaking contact on vibration
- PossibleCracked sensing element giving unstable resistance
- Less likelyECM software issue (Infiniti VR30DDTT reprogramming)
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Exhaust gas temperature sensorEgt harness
What each part of P2081 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 0 | Area: fuel and air metering and auxiliary emission controls. |
| 81 | The exact fault in that area. |
What to do next
- Note P2081 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2081
What does P2081 mean?
P2081 means "Exhaust Gas Temperature Sensor Circuit Intermittent (Bank 1 Sensor 1)". P2081 is set when the signal of exhaust temperature sensor 1 on bank 1 jumps between consecutive readings faster than real exhaust gas can change. It is a generic code, so it means the same on every make.
Is it safe to drive with P2081?
Drive gently and only to a workshop. With P2081 the car can go into limp mode (reduced power) to protect itself.
Will P2081 fail an emissions test?
Yes, it can. P2081 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2081 to fix?
Difficulty: medium. A typical repair takes 0.3 to 1.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2081 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.