What is the code P0778?
OBD II fault code P0778 is a generic code that is defined as “Pressure control solenoid B -electrical malfunction”, and is set when the PCM (Powertrain Control Module) detects that the output voltage to the pressure control solenoid labelled “B” is either stuck at 0 volts, or is shorted to battery voltage when the …
What does the code P0740 mean?
torque converter clutch circuit
What the P0740 code means. What the P0740 code means is that the powertrain control module (PCM) has detected something unusual within the torque converter clutch circuit. If the torque converter clutch application is abnormal (usually multiple times) the powertrain control module will trigger a Check Engine Light.
How do you fix a P0740 code?
Repairs that can fix the P0740 code may include:
- Replacing the torque converter clutch solenoid.
- Replacing the torque converter or clutch.
- Adding or replacing transmission fluid and filter.
- Replacing the powertrain control module.
- Overhauling the current transmission.
- Replacing the transmission with a brand new one.
When to use the p0778 code on a solenoid?
The code P0778 is set by the PCM when the Pressure Control Solenoid “B” is experiencing an electrical malfunction. Example of a transmission pressure control solenoid:
When does the PCM set the code p0778?
The code P0778 is set by the PCM when the Pressure Control Solenoid “B” is experiencing an electrical malfunction. Example of a transmission pressure control solenoid: What is the severity of this DTC?
What causes a transmission solenoid to malfunction?
When a transmission solenoid is malfunctioned, in most cases the problem is not the electrical part of the solenoid; the problem is foreign material obstructing the mechanical function of the solenoid or the flow of the fluid through the transmission valve body.
How does the PCM control the pressure solenoids?
Based on the signals from associated devices monitoring the speed of the vehicle, the PCM controls the pressure solenoids to direct fluid at the appropriate pressure to various hydraulic circuits that change the transmission gear ratio at the correct time.