Powertrain, generic · Transmission

P0759 Shift Solenoid B Intermittent

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

A shift solenoid is an electrically switched valve in the valve body. Manufacturers use these codes differently: Ford reports an open circuit with the base code and shorts separately, newer GM units have separate low/high codes, and the letter is not tied to a valve number (Saab's 9-5: A = valve S2). P0759 is an intermittent fault of solenoid B: the feedback briefly shows a fault and then recovers. No manufacturer document available to us uses this code: Ford watches its solenoid circuits continuously under the open and short codes, GM counts failures over a window (more than 43 of 50) under P0758. Brief dropouts make the module switch the solenoid off and enter limp mode until the next start.

Likely causes

Loose contact or corrosion at the transmission connector
Chafed harness, dependent on temperature or vibration
Coil with heat-dependent winding fault

Symptoms

  • Limp mode or jolt at times, then normal again
  • Warning lamp comes and goes

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–600
Time0.5–3 h

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

Parts involved

shift solenoidtransmission valve bodytransmission wiringtransmission control module

Related codes

P0758P0755P0976P0977P0754

References: law.cornell.edu, newtonnet.co.uk, gsi.ext.gm.com.