Powertrain, generic (extended)

P283B Shift Fork C Position Circuit

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P283B is the generic circuit code for the shift fork C position sensor. The only public manufacturer listing that uses it comes from Mercedes-Benz: on the 8G-DCT dual-clutch transmission (724.1) P283B00 stands for an electrical fault of the fork C sensor and belongs to the codes covered by its XENTRY repair routine for this gearbox. GM's Corvette software, in which fork C is rod 3 on the even-gear shaft, and Ford's TR9070, which calls it rod position sensor 3, do not set P283B and break circuit faults down into P283D, P283E and P283F instead. Ford's 2012 DPS6 has just two shift drums and no fork C code. Once the reading is lost, the gears this fork engages are normally dropped and the transmission continues in a fallback mode.

Likely causes

Fork C position sensor with an internal electrical fault
Poor contact or moisture at the sensor or TCM connector
Damaged sensor input in the transmission control module

Symptoms

  • Transmission warning in the instrument cluster
  • Gears handled by fork C no longer engaged
  • Emergency mode with reduced performance

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€200–2,500
Time1–6 h

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

Parts involved

shift fork cshift fork position sensor cwiring harness

Related codes

P283CP283DP283EP283FP2836

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