Powertrain, generic (extended)

P2835 Shift Fork A Position Circuit Intermittent

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2835 covers a fork A position signal that is present but unsteady. GM's 2023 Corvette dual-clutch table checks the carrier frequency of the rod 1 sensor and sets a Type A fault once it leaves the 1500 to 2500 Hz band for 150 ms; Ford's 2024 summary calls the same check on the TR9070 frequency out of range. In Ford's 2012 DPS6 summary for Fiesta and Focus the code has another meaning: the shift drum A motor reports its rotation through three Hall sensors, and P2835 sets when their pattern appears in the wrong order. Dropouts usually come from loose terminals, damaged shielding or interference on the signal wire. The driver may notice an occasional refused or delayed shift and a warning lamp that is not always on.

Likely causes

Intermittent contact at the sensor or module connector
Interference or damaged shielding on the signal line
Faulty Hall sensor in the shift drum motor (Ford DPS6)

Symptoms

  • Occasional refused or late shift
  • Warning lamp that comes and goes
  • Hesitation or no drive when pulling away

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–2,500
Time1–6 h

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

Parts involved

shift fork ashift fork position sensor awiring harness

Related codes

P2831P2833P2834P2832P283A

References: gsi.ext.gm.com, fordservicecontent.com, newtonnet.co.uk.