Acura OBD-II Error Code P1194

Acura OBD-II Major Transmission

Model: OBD-II | Code: P1194

Applicable Systems
ILX TLX RDX MDX NSX

Symptoms

The TCM has detected a manufacturer-specific transmission control fault. The transmission warning light is on. DTC P1194 is stored in the Acura engine control module.

Possible Causes

  • Shift solenoid electrical fault
  • Transmission control module fault
  • Input/turbine speed sensor fault
  • Output speed sensor fault

Troubleshooting Steps

  1. Step 1: Connect an OBD-II scanner and read DTCs to confirm P1194
    DTC P1194 present with freeze frame data
  2. Step 2: Inspect wiring and connectors in the affected circuit for damage, corrosion, or loose pins
    Wiring intact, connectors clean and seated
  3. Step 3: Perform component-level testing per manufacturer service manual
    Component values within spec or component confirmed faulty
  4. Step 4: Repair or replace the faulty component, clear DTC, and verify no return
    DTC cleared and does not return after a road test

How to Reset

Clear the DTC after repair using a diagnostic scanner. The code clears automatically if the fault is not detected for 3 consecutive drive cycles.

Common Replacement Parts

  • varies: Diagnose and replace the confirmed faulty component (Confirm part number via VIN at a Acura dealership)

Frequently Asked Questions

  • Q: What does P1194 mean?

    This manufacturer-specific DTC indicates a transmission system fault. Refer to the vehicle's service manual for the exact diagnostic procedure.

  • Q: Can I drive with P1194?

    Limited driving is possible, but the affected system may not operate correctly. Have the vehicle diagnosed promptly to prevent potential damage.

Related Acura Fault Codes

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Source: SAE J2012 Acura Manufacturer-Specific DTC

Category: OBD-II