P0749
Pressure Control Solenoid "A" Intermittent
- Severity
- High
- Driving
- Drive only to a garage
The circuit for pressure control solenoid "A" is faulting intermittently. The transmission may drive normally for long periods and then shift harshly or drop into limp mode without obvious cause, recovering after a restart. Intermittent electrical faults here are usually connections rather than components.
Possible causes
- CommonLoose or corroded pin at the transmission case connector
- CommonFluid wicking into the connector
- CommonInternal transmission harness beginning to fail
- PossibleSolenoid dropping out when hot
- PossibleChafed wiring making intermittent contact
What you might notice
- Occasional harsh shift or limp mode that clears after a restart
- Symptoms appearing only when the transmission is hot
- Check engine light coming and going
- Shift quality varying from journey to journey
What to check, in order
- Note whether it only happens hot. A fault that appears after twenty minutes of driving and clears overnight points strongly at the internal harness or the solenoid itself.
- Pull the case connector and inspect for fluid and corrosion.
- Wiggle-test the external harness with the engine running and the live data screen showing solenoid status.
- Check the fluid level and condition.
- Record the freeze frame data if the tool supports it. Knowing the fluid temperature when the fault set is often what identifies a heat-related failure.
Read this code from your own car
Plug an ELM327 adapter into the OBD-II port under the dashboard. Pin16 reads every stored, pending and permanent code, explains each one like this page does — offline, with no account — and shows what the car recorded when the fault was set.
Where this code sits
P00xxP01xxP02xxP03xxP04xxP05xxP06xxP07xxP08xxP09xxP0AxxP0BxxP0CxxP0DxxP0ExxP0FxxP10xxP11xxP12xxP13xxP14xxP15xxP16xxP17xxP18xxP19xxP1AxxP1BxxP1CxxP1DxxP1ExxP1FxxP20xxP21xxP22xxP23xxP24xxP25xxP26xxP27xxP28xxP29xxP2AxxP2BxxP2CxxP2DxxP2ExxP2FxxP30xxP31xxP32xxP33xxP34xxP35xxP36xxP37xxP38xxP39xxP3AxxP3BxxP3CxxP3DxxP3ExxP3Fxx
Transmission
P0700P0701P0702P0703P0704P0705P0706P0707P0708P0709P0710P0711P0712P0713P0714P0715P0716P0717P0718P0719P0720P0721P0722P0723P0724P0725P0726P0727P0728P0729P0730P0731P0732P0733P0734P0735P0736P0737P0738P0739P0740P0741P0742P0743P0744P0745P0746P0747P0748P0749P0750P0751P0752P0753P0754P0755P0756P0757P0758P0759P0760P0761P0762P0763P0764P0765P0766P0767P0768P0769P0770P0771P0772P0773P0774P0775P0776P0777P0778P0779P0780P0781P0782P0783P0784P0785P0786P0787P0788P0789P0790P0791P0792P0793P0794P0795P0796P0797P0798P0799