OBD-II DTC P1794 – Pressure Control Solenoid “B” Short Circuit
DTC P1794 meaning
DTC P1794 refers to a diagnostic trouble code indicating a short circuit in the Pressure Control Solenoid “B” circuit. This solenoid is part of the transmission system and is responsible for regulating hydraulic pressure within the transmission. A short circuit can disrupt the solenoid’s function, leading to improper transmission operation.
DTC P1794 symptoms
Common symptoms associated with DTC P1794 may include:
- Transmission slipping or harsh shifting
- Delayed engagement when shifting gears
- Check Engine Light illuminated
- Reduced fuel efficiency
- Unusual noises from the transmission
DTC P1794 causes
Several factors can lead to the occurrence of DTC P1794, including:
- Faulty Pressure Control Solenoid “B”
- Wiring issues, such as frayed or damaged wires
- Corroded connectors in the solenoid circuit
- Faulty transmission control module (TCM)
- Low transmission fluid levels or contamination
DTC P1794 seriousness
DTC P1794 is considered a serious issue as it can affect the transmission’s performance and overall vehicle safety. If left unaddressed, it may lead to further transmission damage, increased repair costs, and potential safety hazards while driving.
How to diagnose DTC P1794
To diagnose DTC P1794, follow these steps:
- Use an OBD-II scanner to confirm the presence of the P1794 code.
- Inspect the wiring and connectors related to the Pressure Control Solenoid “B” for any visible damage or corrosion.
- Check the transmission fluid level and condition.
- Test the Pressure Control Solenoid “B” for proper operation using a multimeter.
- Examine the transmission control module (TCM) for faults.
How to fix DTC P1794 step-by-step instructions
To fix DTC P1794, follow these steps:
- Repair or replace any damaged wiring or connectors found during diagnosis.
- If the Pressure Control Solenoid “B” is faulty, replace it with a new one.
- Ensure the transmission fluid is at the correct level and is clean replace if necessary.
- Recheck the TCM for any faults and replace if needed.
- Clear the DTC using an OBD-II scanner and test drive the vehicle to ensure the issue is resolved.