Powertrain, generic (extended)

P246E Exhaust Gas Temperature Sensor Circuit (Bank 1 Sensor 4)

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

P246E is the general code for the fourth exhaust temperature probe on bank 1, usually the last one in the aftertreatment line. Ford's diesels give it a model check rather than an electrical one: after a cold start the measured EGT14 value may differ from the modelled temperature by no more than 80 °C, the comparison lasting 200 to 400 s and the deviation having to persist for 20 s. Dedicated low and high signal faults of the same probe go to P2470 and P2471, and sensor-to-sensor plausibility to P246F. Volvo Trucks lists P246E-15 among the EGT faults on VNL tractors whose fix is replacing the affected exhaust temperature sensor (RD24-034). CARB requires continuity and rationality checks on emission-relevant inputs. A bad value often pauses regeneration or DEF dosing.

Likely causes

Probe aged or failed, reading far from the model
Probe loose or not reaching into the gas stream
Exhaust leak near the probe cooling the reading

Symptoms

  • MIL on
  • Value of the last exhaust probe deviates from expectation
  • 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 b1s4

Related codes

P246FP2470P2471P2472P242AP24C2

References: fordservicecontent.com, static.nhtsa.gov, law.cornell.edu.