Powertrain, generic · Transmission

P0771 Shift Solenoid E Performance/Stuck Off

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

What shift solenoid E does depends on the transmission. On Ford's 6R80 and 6F35/6F55 it is an on/off valve that moves a multiplex valve, so solenoid D feeds either the low/reverse brake or the 4-5-6 clutch; on the 6R140 and 5R110W it is a proportional clutch valve with separate short codes (P0985/P0986). On Saab's Aisin 5-speed E is valve S1. P0771 is Ford's functional check by gear ratio over 10 events (2012) or 3 (2020–23, 2023 diesel). On the 6R80/6F it means the multiplex valve stays in its rest position, so solenoid D acts on the wrong clutch; valve and spool cannot be told apart. On the 6R140 the 4-5-6 clutch does not apply. Ford counts the whole clutch system in, and its 10R80 and 8F35 bulletins list P0771 with mechanical repairs. Slipping or missing gears and limp mode follow.

Likely causes

Valve body or multiplex valve sticking (debris, dirt)
Clutch, piston seal or clutch cylinder leaking or worn
Fluid level low or fluid contaminated
Solenoid E mechanically stuck

Symptoms

  • Slipping or flare on shifts
  • Missing gear (e.g. 4th–6th)
  • Limp mode
  • Check engine light

Repair estimate

DifficultyHardWorkshop job
Parts and labour€400–4,500
Time2–14 h

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

Parts involved

shift solenoidmultiplex valvetransmission valve bodytransmission control module

Related codes

P0770P0772P0766P0734P0735P0985

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