Powertrain, generic · Transmission

P084E Transmission Fluid Pressure Sensor/Switch H Circuit Intermittent

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

Transmission fluid pressure sensor/switch H is the last of up to eight pressure inputs (A to H) in SAE J2012; the letter is the maker's choice. Documented uses are rare: Mitsubishi sets P084A on its Jatco CVT8 (F1CJC/W1CJC) and Ford P084B on the 2020–23 Explorer 3.3 full hybrid. For P084E no maker is documented. It reports short dropouts or jumps of the H signal without a lasting low or high, typically from a loose contact or corrosion at the gearbox connector.

Likely causes

Loose contact or corrosion at the gearbox connector
Chafed spot in the harness
Dirt at sensor or valve causing signal jumps
Sensor faulty internally

Symptoms

  • Warning lamp coming and going
  • Occasional shift shocks
  • Brief limp mode

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€120–900
Time1–5 h

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

Parts involved

transmission fluid pressure sensortransmission valve bodytransmission wiringtransmission control module

Related codes

P084AP084BP084CP083EP0844

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