P2471 code meaning
Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 4)
Powertrain system Generic code P24xx codes Check engine light
What P2471 means
P2471 is set when the fourth bank 1 exhaust temperature probe drives its input above the upper limit, the picture of an open circuit, an unplugged sensor or a short to voltage. Ford's diesels call more than 2.66 V a fault. GM checks both a short to power and an open driver circuit: above 900 Ω in the 2017 and 2020 tables, above 1,400 Ω in 2018, with 10 failed readings in 20; the 2020 and 2025 tables rate it Type A, so the MIL can come on in the first trip, and 2025 uses more than 100 MΩ or a digital reading above about 1,290 °C. Ram includes P2471 in case S2625000003 for 2025–2026 Ram 2500/3500 and points technicians to sensor names rather than numbers when locating the part. Start with the connector and a cold resistance check. Too low is P2470.
P2471 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 1.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2471
- MIL on, on GM possibly in the first trip
- Last exhaust probe shows maximum or substitute value
- Regeneration or DEF dosing inhibited
Common causes of P2471
- Most likelyConnector unplugged or wire broken (open circuit)
- PossibleSensing element burnt out
- Less likelySignal line shorted to a voltage source
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Egt sensor b1s4Egt wiring
What each part of P2471 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 4 | Area: auxiliary emission controls (catalytic converter, EGR, EVAP). |
| 71 | The exact fault in that area. |
What to do next
- Note P2471 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 P2471
What does P2471 mean?
P2471 means "Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 4)". P2471 is set when the fourth bank 1 exhaust temperature probe drives its input above the upper limit, the picture of an open circuit, an unplugged sensor or a short to voltage. It is a generic code, so it means the same on every make.
Is it safe to drive with P2471?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2471 fail an emissions test?
Yes, it can. P2471 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 P2471 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 P2471 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.