What it means
The transmission control module monitors the electrical circuit for pressure control solenoid P. It sets this code when the circuit has an electrical fault, such as an open or short.
At a glance
- Usually lights the check-engine light
How it works
Pressure Control Solenoid P is an electrically operated valve that the transmission control module uses to regulate hydraulic pressure. This code sets when the module detects an electrical fault in Solenoid P’s circuit, such as an open coil or a harness short, rather than the expected circuit operation.
Common causes
Most likely first.
- Open solenoid coil
- Short to ground or battery in the harness
Symptoms
- Transmission warning light may illuminate
- Harsh or delayed shifting
- Transmission may enter limp mode
How to diagnose it
- Record freeze-frame data and check for other transmission electrical codes that may point to a shared power, ground, or connector problem.
- Inspect the Solenoid P connector and harness for chafing, pin damage, corrosion, fluid intrusion, or a disconnected plug.
- Check the solenoid circuit fuse and power or ground feeds if the vehicle’s wiring information identifies them as part of this circuit.
- Measure Solenoid P coil resistance and compare it with the manufacturer’s specification to identify an open or internally shorted coil.
- Test the circuit wiring for opens and shorts to ground or battery voltage, isolating the solenoid and module as specified by the service procedure.
Common fixes
- Reconnect or clean the Solenoid P connector and repair damaged terminals.
- Repair an open or shorted section of the Solenoid P harness.
- Replace Pressure Control Solenoid P if its coil is open or shorted.
- Repair the control module circuit only if circuit testing confirms the module is at fault.
Can I keep driving?
Drive only as needed to reach a safe place for repair; the transmission may shift harshly or enter a protective mode. Avoid high speeds, heavy loads, and continued driving if shifts become unreliable.
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.