Pressure control solenoids are used by the vehicle’s computer to set the hydraulic pressure needed to actuate a shift. If the ECU detects that the pressure control solenoid labeled F is stuck in the On position, it will save a P2733 DTC.
How Serious is the Code?
When you see a P2733 diagnostic trouble code, it means that your car’s computer can’t control the hydraulic pressure inside the transmission. This will lead to a number of transmission problems like slipping, delayed shifts and engine stalling. The computer may also command maximum line pressure to compensate, which will cause premature wear to many vital transmission parts.
Symptoms of a P2733 include:
- Harsh, erratic shifts
- Engine stalls while stopped in gear
- Transmission won’t shift out of a gear
- Transmission can’t engage a gear
- Increased fuel consumption
- Transmission overheats
- Limp mode
- Insufficient transmission fluid
- Dirty transmission fluid / filter
- Frayed wiring / damaged connectors
- Failing pressure control solenoid
- Failing transmission pump
- Internal pressure problems
- Valve body issue
- ECU or TCM failure
How to Diagnose the Code?
To properly diagnose a P2733 diagnostic trouble code, your mechanic should first check the level and condition of the transmission fluid. If you don’t have enough transmission fluid or it’s too dirty, the pressure control solenoid won’t work properly and this can cause it to get stuck in the On position. If there are no issues with the transmission fluid, then the wiring and connectors on the transmission wiring harness should be checked. Frayed wires and corroded connectors can cause this problem too. If no problems have been found up to this point, then the pressure control solenoid, and possibly the transmission pump, valve body and ECU should be tested.
What Repairs Will Fix P2733?
- Changing the fluid and filter
- Replace faulty pressure control solenoid
- Repair or replace a faulty transmission pump
- Repair defective transmission valve body
- Install a remanufactured valve body
- Transmission flush to clean passages
- Cleaning corrosion from connectors
- Repairing or replacing wiring
- Flashing or replacing PCM
- P2731 – Pressure Control Solenoid F
- P2732 – Pressure Control Solenoid F Perf or Stuck Off
- P2734 – Pressure Control Solenoid F Electrical
- P2735 – Pressure Control Solenoid F Intermittent
- P2736 – Pressure Control Solenoid F Ctrl Circ/Open