Powertrain, generic (extended)

P2473 Exhaust Gas Temperature Sensor Circuit (Bank 2 Sensor 4)

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modeNo

P2473 covers the wiring of probe number four in the bank 2 exhaust line as a whole, so it only occurs on engines with two separate exhaust paths and a long sensor chain on each. The controller sets it when the probe line delivers a value it cannot assign to a clean low or high fault, for instance an open circuit or a sensor reporting an internal error. No maker documents P2473 publicly. The bank 1 counterpart P246E shows how it can be used: Ford's 2023 diesel summary compares that probe against a temperature model after a cold start. CARB demands circuit continuity checks on every emission-relevant input. For the driver it means a lit MIL and often a paused particulate filter regeneration.

Likely causes

Broken wire or unplugged connector at the bank 2 probe

Probe element burnt out

Fault in the control unit input stage

Symptoms

MIL on
No usable value for bank 2 probe 4 in live data
Filter regeneration suspended

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 b2s4egt wiring

References: law.cornell.edu, fordservicecontent.com.