Powertrain, generic (extended)

P2466 Exhaust Gas Temperature Sensor Circuit (Bank 2 Sensor 3)

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

P2466 is the general circuit code for the third exhaust temperature probe in the bank 2 exhaust path, so it only appears on engines with two separate aftertreatment lines. No manufacturer documents this exact code publicly. The bank 1 counterpart P242A shows how makers fill such a general code: Ford's 2023 diesels use it for a probe that departs more than 80 °C from its modelled value for 20 s, while other makers attach open-circuit detection to it. CARB requires every emission-relevant sensor to be checked for circuit continuity and plausibility. Expect the controller to distrust the reading, to pause regeneration or DEF dosing that relies on it and to light the MIL. Clear low and high signal faults of this probe go to P2468 and P2469 instead.

Likely causes

Temperature probe failed internally or open
Connector or wiring near the exhaust damaged by heat
Probe loose or not reaching into the gas stream

Symptoms

  • MIL on
  • Implausible or missing value for this probe in live data
  • Filter regeneration or DEF dosing suspended

Repair estimate

DifficultyMediumDIY possible
Parts and labour€40–350
Time0.3–1.5 h

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

Parts involved

egt sensor b2s3

Related codes

P2467P2468P2469P246AP242AP2473

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