Powertrain, generic (extended)

P2471 Exhaust Gas Temperature Sensor Circuit High (Bank 1 Sensor 4)

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

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.

Likely causes

Connector unplugged or wire broken (open circuit)
Sensing element burnt out
Signal line shorted to a voltage source

Symptoms

  • MIL on, on GM possibly in the first trip
  • Last exhaust probe shows maximum or substitute value
  • Regeneration or DEF dosing inhibited

Repair estimate

DifficultyMediumDIY possible
Parts and labour€20–350
Time0.3–1.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

egt sensor b1s4egt wiring

Related codes

P2470P2472P246EP246FP242DP2476

References: fordservicecontent.com, gsi.ext.gm.com, gsi.ext.gm.com, static.nhtsa.gov.