Powertrain, generic (extended)

P27E3 Electric/Auxiliary Transmission Fluid Pump Control Valve Circuit/Open

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

The control valve named here decides where the oil from the electric auxiliary pump goes. Volkswagen's training book for the 0GC seven-speed DSG shows such a layout: pressure regulator N218 shifts a spring-loaded changeover piston that sends the flow of pump V475 either to the mechatronic unit or to clutch cooling. No maker publishes P27E3 itself. The code reports that the valve's drive circuit is broken or so resistive that the module measures no proper current: a cut wire, a lifted pin or an open coil. Without the valve the pump flow can end up in the wrong branch, so stop-start or cooling support may be dropped. P27E5 and P27E6 cover shorts, P27E4 a valve that responds wrongly.

Likely causes

Broken conductor in the valve control line
Pin backed out or corroded at the gearbox connector
Valve coil burnt open

Symptoms

  • Stop-start unavailable
  • Warning light with stored open-circuit fault

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€60–900
Time0.5–4 h

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

Parts involved

aux transmission pump control valvewiring harnesstcm

Related codes

P27E4P27E5P27E6P27E1P2796

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