Pressure control solenoids are little spring-loaded plungers that live in the valve body, and maintain hydraulic pressure by directing fluid down the right channel when the ECU sends an electrical charge through the wiring that is wrapped around the plunger mechanism. If the computer notices an intermittent fault with the way this solenoid responds, a P2726 DTC will be set.
How Serious is the Code?
A P2726 diagnostic trouble code is one of the more serious OBD2 trouble codes, because it is set only with a serious functionality issue occurs. As a result, a number of transmission problems including slipping, hard gear changes and engine stalling can happen.
Symptoms of a P2726 include:
- Delayed or harsh shifts
- Erratic transmission behavior
- Transmission slipping
- Engine stalls when coming to a stop
- Transmission gets stuck in a gear
- Vehicle won’t move when in gear
- Lower MPG
- Transmission overheats
- Limp mode
- Dirty transmission fluid / filter
- Not enough transmission fluid
- Damaged wiring/connector
- Malfunctioning pressure control solenoid
- Defective transmission pump
- Blocked pressure passage
- Valve body issue
- TCM or ECU failure
How to Diagnose the Code?
The transmission fluid level and condition are the first things that should be considered when diagnosing a P2726 DTC. Dirty, thin fluid can affect the way the pressure control solenoid’s function, and metal shavings can indicate a much bigger problem. If no maintenance issues are found, then the wiring and connectors on the transmission wiring harness need to be inspected. If everything checks out there, the pressure control solenoid itself will have to be checked, along with possibly the valve body, transmission pump and ECU programming.
What Repairs Will Fix P2726?
- Changing the fluid and filter
- Replace faulty pressure control solenoid
- Repair or replace a faulty transmission pump
- Repair or replace defective transmission valve body
- Transmission flush to clean passages
- Cleaning corrosion from connectors
- Repairing or replacing wiring
- Flashing or replacing PCM
- P2722 – Pressure Control Solenoid E
- P2723 – Pressure Control Solenoid E Perf or Stuck Off
- P2724 – Pressure Control Solenoid E Stuck On
- P2725 – Pressure Control Solenoid E Electrical
- P2727 – Pressure Control Solenoid E Ctrl Circ / Open
- P2728 – Pressure Control Solenoid E Ctrl Circ Range/Perf
- P2729 – Pressure Control Solenoid E Ctrl Circ Low
- P2730 – Pressure Control Solenoid E Ctrl Circ High