What it means
The transmission control module monitors pressure control solenoid F for a consistent response. This code sets when the solenoid's operation is intermittent, with the title not specifying whether the cause is electrical or hydraulic.
At a glance
- Usually lights the check-engine light
How it works
Pressure control solenoid F varies hydraulic pressure in response to TCM commands. P2735 means its response is inconsistent, so the fault may be an intermittent electrical connection, a coil that changes with temperature, or inconsistent hydraulic movement.
Common causes
Most likely first.
- Solenoid connector not fully seated
- Coil resistance drifts with temperature
- Connector with intermittent contact under vibration
Symptoms
- Check-engine or transmission warning light on
- Intermittent harsh or delayed shifts
- Intermittent slipping or shuddering
- Transmission may enter limp mode
How to diagnose it
- Save freeze-frame data and check whether the fault occurred cold, hot, or during a particular shift; note any related codes.
- Check fluid level and condition using the manufacturer's procedure, and record when harsh or delayed shifts occur.
- Inspect solenoid F's connector, terminals, and harness for a loose fit, corrosion, fluid intrusion, or vibration-related damage.
- With live data available, watch solenoid F command and circuit response while gently moving the accessible harness to find a changing connection.
- Check solenoid F coil resistance when cold and after it warms, comparing readings with the manufacturer's specification.
- If the electrical response stays consistent, inspect the solenoid and valve body for sticking or contamination.
Common fixes
- Fully seat and secure the solenoid F connector.
- Clean or repair corroded terminals and replace damaged wiring or connector seals.
- Replace solenoid F if its coil response changes outside the manufacturer's specification as it warms.
- Clean or repair the valve body if solenoid F intermittently sticks.
Can I keep driving?
Intermittent faults can suddenly cause harsh shifts, slipping, or reduced drive, so keep trips short and avoid towing or hard acceleration. Stop driving if the transmission loses drive or enters a restricted gear mode.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.