Powertrain, generic · Transmission

P0749 Pressure Control Solenoid A Intermittent

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

Pressure control solenoid A sets line or clutch pressure by current; most are 'normally high', so with no current – as in limp mode – maximum pressure applies. 'A' is usually the line pressure valve, on GM clutch-to-clutch transmissions (6T, 8L, 9T) the pressure valve of clutch 1. Ford does not use P0745–P0749 but P0960–P0963. P0749 is an intermittent fault in the circuit of this valve. No manufacturer document available to us uses it; Mitsubishi defines the sister code for valve B (P0779) as circuit open or shorted to positive for 1 s. Brief current or voltage dropouts make the module switch the valve off – maximum pressure – and retest it, so harsh shifts or limp mode appear at times and vanish after a restart.

Likely causes

Loose contact or corrosion at the transmission connector
Chafed harness (intermittent short)
Valve with temperature-dependent winding fault
Voltage dips or poor ground

Symptoms

  • Harsh shifts at times
  • Occasional limp mode, normal again after restart
  • Warning lamp (sometimes only stored)

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–1,200
Time1–4 h

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

Parts involved

pressure control solenoid atransmission valve bodytransmission wiringtransmission control module

Related codes

P0745P0748P0746P0747P0779

References: law.cornell.edu, mitsubishitechinfo.com, saabwisonline.com.