Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
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A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P0974Shift Solenoid “A” Control Circuit High
Manufacturer communications
3Original wording in English
SUBARU
"This bulletin announces availability of the new TR580 control valve and connector cover developed to address cases of the following DTCs detected by the Transmission Control Module (TCM): • P2721: Pressure Control Solenoid “D” Control Circuit High • P2763: Torque Converter Clutch Pressure Control Solenoid Control Circuit High •…
HINO
2012-2015 COE Transmission DTC P0974 - P0986, may be found on, There could also be a complaint of low power and erratic shifting. These diagnostic codes may be set due to low voltage between the transmission case and the battery post.
HINO
TT-15-014 The transmission DTC?s P0974 and P0986, may be found on 12MY-15MY COE models. There could also be a complaint of low power and erratic shifting. These diagnostic codes may be set due to low voltage between the transmission case and the battery post.
Check vehicle applicability
87A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Code meaning and manufacturer information
Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.
Shift Solenoid A Control Circuit High
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.