Powertrain, generic (extended)

P2801 Transmission Range Sensor B Circuit Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

Here the B signal of the range sensor is electrically present but its content does not make sense. On sensors with a pulse-width output, Ford checks the carrier frequency: its 2024 summary sets P2801 (UDS P2800_38) on the 6R80, 6R140, 10R60 and 10R80 automatics when the frequency leaves 125 Hz plus or minus 25 Hz, while the 2012 summary applies the same test to the 250 Hz signal of the DPS6 dual-clutch box. On the hybrid eCVT, Ford's 2019 summary instead compares two sensor angles and fails it beyond 3.85 degrees, with the wrench lamp only. Ford SSM 49822 lists P2801 among range and fluid temperature sensor codes on 2020-2021 Super Duty trucks with the 10R140. P0706 is the A-side counterpart.

Likely causes

Range sensor electronics producing a wrong signal frequency
Damaged or loose pins at the transmission connector
Sensor shifted on its shaft so the angles disagree

Symptoms

  • Warning lamp with shift quality or gear display issues
  • Transmission uses a fixed substitute range strategy

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–700
Time0.5–3 h

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

Parts involved

transmission range sensor bwiring harnesstcm

Related codes

P0706P2800P2802P2803P2805

References: fordservicecontent.com, newtonnet.co.uk, fordservicecontent.com, static.nhtsa.gov.