WOMS
P code powertrain Medium severity

P1912 VFS C Pressure Output Failed Low

The OBD2 code P1912 VFS C Pressure Output Failed Low indicates that the Vehicle Fluid System (VFS) C pressure sensor is reporting a low output signal, suggesting a potential issue with the sensor or the system it...

Definition

The OBD2 code P1912 VFS C Pressure Output Failed Low indicates that the Vehicle Fluid System (VFS) C pressure sensor is reporting a low output signal, suggesting a potential issue with the sensor or the system it monitors

Common causes

  • Faulty Variable Force Solenoid (VFS) C
  • Wiring issues or damaged connectors
  • Low transmission fluid level
  • Contaminated or degraded transmission fluid
  • Faulty transmission control module (TCM)
  • Internal transmission problems
  • Poor ground connections

Common misdiagnoses

  • Faulty transmission control module (TCM)
  • Defective pressure sensor
  • Wiring issues or short circuits
  • Low transmission fluid level
  • Faulty valve body
  • Transmission solenoid issues
  • Engine control module (ECM) problems
  • Incorrectly calibrated transmission system

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other related trouble codes. This can provide more context and help identify if there are other issues present

  2. 2. Inspect Wiring and Connectors

    Examine the wiring and connectors associated with the VFS C solenoid. Look for signs of damage, corrosion, or loose connections that could affect the solenoid's operation

  3. 3. Test the VFS C Solenoid

    If accessible, test the VFS C solenoid for proper operation. This can often be done by measuring the resistance across the solenoid terminals with a multimeter. Compare the readings to the manufacturer's specifications

  4. 4. Check Transmission Fluid Level and Condition

    Low or contaminated transmission fluid can cause various transmission issues, including solenoid problems. Ensure the fluid is at the correct level and in good condition (not burnt or contaminated)

  5. 5. Inspect the Transmission Control Module (TCM)

    The TCM controls the operation of the solenoids. Check for any signs of damage or malfunction. If the TCM is faulty, it may need to be reprogrammed or replaced

  6. 6. Perform a Visual Inspection of the Transmission

    Look for any signs of leaks or damage to the transmission that could affect solenoid operation

  7. 7. Check for Mechanical Issues

    Internal transmission problems, such as sticking valves or worn components, can also lead to solenoid issues. A thorough inspection may be necessary

  8. 8. Clear Codes and Test Drive

    After performing any repairs or adjustments, clear the trouble codes and take the vehicle for a test drive to see if the code returns

  9. 9. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the P1912 code for your specific vehicle make and model. Manufacturers may have issued guidance or fixes for known issues

  10. 10. Seek Professional Help

    If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or transmission specialist for further diagnosis and repair. By following these steps, you can systematically identify and address the underlying cause of the P1912 code