P0749: Pressure Control Solenoid A Intermittent

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.

Medium severity. Can I keep driving?Drive as little as possible and gently. If the transmission slips or stays in one gear, go slowly to a repair shop or call for a tow truck.

Symptoms

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

Most 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

What to check, in order

Start with the simplest. You can tick off each step.

Check the fluid level and condition according to the manufacturer
Gently move the wiring with the engine running and watch whether the reading changes.
Check the transmission connector
Read the data with a transmission-compatible scanner
Measure the solenoid valve circuit
Leave opening the transmission to a specialized repair shop

Good to know

Repair difficulty: medium
It can trigger limp mode.
It affects emissions.

What each character of P0749 means

P: Powertrain: engine and transmission
0: Generic code: same on every make
7: Transmission
49: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0749?

Drive as little as possible and gently. If the transmission slips or stays in one gear, go slowly to a repair shop or call for a tow truck.

What causes code P0749?

The most common causes are: loose contact or corrosion at the transmission connector; chafed harness (intermittent short); valve with temperature-dependent winding fault.

Related codes

Sources

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.