Question about 2006 Toyota Matrix

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Pressure control solenoid "D" electrical

Anyone have a solution to this? i have the same issue. it jerks at 10mph whenever i increase speed from 0mph. that's the only **** i experience until i have to stop and increase speed again.

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  • matthewkoosh Sep 16, 2009

    this has just began and my car is at 122,000 miles :(
    what would you suggest? toyota nearby says they can replace for about $900. i heard i could ask the toyota region representative or something to overrule the problem of my mileage being higher than the limit at which this happened, but i don't know where to find his/her number.
    thanks a lot,

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  • Toyota Master
  • 1,861 Answers

Is the check engine light on? Does it have a P-2716 code displayed on a scan tool? If so, you need a electronic control unit (the computer), AND, it will be replaced free by your Toyota dealer if the vehicle is under 80,000 miles.

Posted on Sep 16, 2009

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Posted on Jan 02, 2017

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I have a 05 Malibu jerks to every shift. Flashing two codes together po748 and co561 what does it mean?


When the PCM detects a continuous open, short to ground or short to voltage in the PC solenoid valve circuit, then DTC P0748 sets. DTC P0748 is a type C DTC.
PC - pressure control solenoid .
The powertrain control module (PCM) uses the pressure control (PC) solenoid valve in order to regulate the transmission line pressure. The PC solenoid valve consists of an electrical connector, a coil, an armature, a regulating spring, and a poppet valve. The PC solenoid valve is attached to the control valve body. The PCM compares TP voltage, fluid temperature, gear states, and other inputs in order to determine the line pressure appropriate for a given load. The PCM regulates the pressure by applying a varying amperage to the PC solenoid valve. The applied amperage varies from 0.1 amps for maximum line pressure to 1.1 amps for minimum line pressure. The PCM then monitors the amperage at the return line.
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Whenever I speed up to about 100km/hr the engine star jerking and until I stop and start again.


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http://www.obd-codes.com/p0700
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Electronic pressure control solenoid circuit p1745. Check engine light on 2000 ford escort, 4cl, automatic. Advance auto told me it was a dealer part but I can't find it on any of the ford websites?...


Here is what the service manual says about the EPC solenoid, the processor looks at allot of different inputs to command the solenoids, such as Throttle Position Sensor, Vehicle Speed Sensors, Transmission Range Sensor and RPM signal, The PCM controls the shift patterns for the transmission. Electronic Pressure Control (EPC) Solenoid
The electronic pressure control (EPC) solenoid is located on the main control valve body and is controlled by the PCM. The EPC controls line pressure used to apply and release clutches and bands in the transmission.
The 2-3 shift solenoid is located on the main control valve body and is switched on and off by electrical signals from the PCM. The 2-3 shift solenoid activates the 2-3 shift valve which controls the automatic shifting between second and third gear. Second gear is established when the 2-3 shift solenoid is switched on. The 2-3 shift solenoid is switched off when vehicle speed increases and requires a second to third gear upshift.
The 3-4 shift solenoid is located on the main control valve body and is switched on and off by electrical signals from the PCM. The 3-4 shift solenoid activates the 3-4 shift valve which controls the automatic shifting between third and fourth gear. Third gear is established when the 3-4 solenoid is switched off. The 3-4 shift solenoid is switched on when vehicle speed increases and requires a third to fourth gear upshift.

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2005 jeep grand cheroke limited with A hemi, been to the dealer more times then I can count, and still to this day the same problem. The service elect brake system light illuminates intermit and so for...


The braking force of the rear wheels is controlled by electronic brake distribution (EBD). The EBD functions like a rear proportioning valve. The EBD system uses the ABS system to control the slip of the rear wheels in partial braking range. The braking force of the rear wheels is controlled electronically by using the inlet and outlet valves located in the HCU. The HCU is a Hydraulic control unit. The HCU consists of a valve body, pump motor, and wire harness.

Did they check for DTC (diagnostic trouble codes) in the system? if so, what were they?

Accumulators in the valve body store extra fluid released to the system for ABS mode operation. The pump is used to clear the accumulator of brake fluid and is operated by a DC type motor. The motor is controlled by the ABM.
The valves modulate brake pressure during antilock braking and are controlled by the ABM.
The HCU provides four channel pressure control individually to all the front and rear brakes. Each of the four channels control the rear & front wheel brakes individually.
During antilock braking, the solenoid valves are opened and closed as needed. The valves are not static. They are cycled rapidly and continuously to modulate pressure and control wheel slip and deceleration.
During normal braking, the HCU solenoid valves and pump are not activated. The master cylinder and power booster operate the same as a vehicle without an ABS brake system.
During antilock braking, solenoid valve pressure modulation occurs in three stages, pressure increase, pressure hold, and pressure decrease. The valves are all contained in the valve body portion of the HCU.


PRESSURE DECREASE The outlet valve is opened and the inlet valve is closed during the pressure decrease cycle.
A pressure decrease cycle is initiated when speed sensor signals indicate high wheel slip at one or more wheels. At this point, the ABM closes the inlet then opens the outlet valve, which also opens the return circuit to the accumulators. Fluid pressure is allowed to bleed off (decrease) as needed to prevent wheel lock.
Once the period of high wheel slip has ended, the ABM closes the outlet valve and begins a pressure increase or hold cycle as needed.


PRESSURE HOLD Both solenoid valves are closed in the pressure hold cycle. Fluid apply pressure in the control channel is maintained at a constant rate. The ABM maintains the hold cycle until sensor inputs indicate a pressure change is necessary.


PRESSURE INCREASE The inlet valve is open and the outlet valve is closed during the pressure increase cycle. The pressure increase cycle is used to counteract unequal wheel speeds. This cycle controls re-application of fluid apply pressure due to changing road surfaces or wheel speed.

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Older transmissions also make use of an auxiliary circuit for downshifting. This circuit may be actuated by the throttle linkage, vacuum that actuates the modulator, or by a cable or solenoid. It applies pressure to the downshift surface on the shift valve or valves.
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1 Answer

Pressure Control Solenoid P2716


have the code checked especially if the car is out of warranty. If it is still under warranty take the car to the dealership . The Pressure Control Solenoid determines the quality and accuracy of the shift points and if you let it go the transmission will not shift properly after a period of time. The pressure control solenoid is used by the PCM to raise the mainline hydraulic pressure during high throttle - this increases the holding force on the clutches and bands and prevents slipping. The pressure control solenoid is controlled by pulses from the PCM and this in turn operates the boost valve insde the valve body.

The problem could be either in the PCM or it could be an electrical problem with the solenoid. As suggested it should be diagnosed by a transmission tech. They can check if the PCM is good by looking at the pulses with an oscilloscope at the connector and they should also be able to test the continuity of the solenoid. If the solenoid is faulty the valve body will need to be removed and the solenoid replaced.
good luck

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