P1773 - FAULT CODE - OBD2

P1773 Code failures by brands

P1773 ACURA, HONDA, ISUZU: CLUTCH PRESSURE CONTROL SOLENOID VALVE 'B' CIRCUIT

Description of DTC code P1773

The solenoid that monitors clutch pressure is used for shift control as well as lock-up control. A spool is located on the solenoid, which actuates the valve based on the duty cycle that is handled by the PCM (Powertrain Control Module). This whole process is performed with the objective of pressurizing the liquid, in order to create a hydraulic pressure proportional to the electrical signal. The Power Train Control Module is in charge of measuring the voltage passing through the pressure control solenoid and consequently adjusts the feedback so that the expected voltage can be compensated with the actual voltage.

The P1773 OBDII fault code is related in certain vehicles to the Clutch Pressure Control Solenoid. In this case, the code indicates that the "B" circuit of the clutch pressure control solenoid has exhibited performance problems.

Symptoms of fault code P1773

Check Engine light illumination.
The transmission clutch is malfunctioning.

Causes of OBD2 P1773

P1773 OBD2 diagnostic code is set for one of the following reasons:

Clutch Pressure Control Solenoid wires could have deficiencies.
Clutch Pressure Control Solenoid "B" circuit connections could have damage causing an open circuit.
The Clutch Pressure Control Solenoid may be faulty.

Possible solutions of the DTC code P1773

To troubleshoot the DTC P1773 OBDII code you must do the following:

Consult the TSB (Technical Service Bulletins) as a first step.
Inspect the wiring related to the clutch pressure control solenoid and check that it does not present common deficiencies caused by corrosion or wear. If such damage is discovered, make the necessary repairs. It is important to note that due to the location of the solenoid, this repair has its level of complexity.
Check with the appropriate tools to ensure that the clutch pressure control solenoid circuit voltages match the specified voltages. Likewise, verify that the solenoid resistance is adequate. If deficiencies are found in the wiring or solenoid, proceed with the appropriate adjustments.