WOMS
P code powertrain Medium severity

P1460 Wide open throttle A/C cutoff relay circuit

The OBD2 code P1460 indicates a malfunction in the wide open throttle (WOT) air conditioning cutoff relay circuit, which affects the operation of the A/C system when the engine is at full throttle

Definition

The OBD2 code P1460 indicates a malfunction in the wide open throttle (WOT) air conditioning cutoff relay circuit, which affects the operation of the A/C system when the engine is at full throttle

Common causes

  • Faulty A/C cutoff relay
  • Wiring issues (shorts or open circuits)
  • Bad connections or corroded terminals
  • Malfunctioning throttle position sensor
  • Faulty engine control module (ECM)
  • Issues with the A/C system (compressor or pressure switch)
  • Vacuum leaks affecting throttle operation
  • Faulty fuses related to the A/C or throttle system

Common misdiagnoses

  • Faulty A/C compressor
  • Bad throttle position sensor
  • Malfunctioning engine control module (ECM)
  • Wiring issues or shorts in the A/C circuit
  • Incorrectly diagnosed fuel system problems
  • Ignition system faults
  • Vacuum leaks
  • Misinterpreted symptoms related to engine performance issues

Troubleshooting steps

  1. 1. Check the Vehicle's Manual

    Refer to the vehicle's service manual for specific information about the A/C cutoff relay and its circuit. This will provide you with wiring diagrams and specifications

  2. 2. Inspect the A/C Cutoff Relay

    Locate the A/C cutoff relay in the fuse box or relay panel. Check for any signs of damage, corrosion, or loose connections. If the relay appears faulty, replace it with a new one

  3. 3. Test the Relay

    Use a multimeter to test the relay. You can do this by applying power to the relay and checking if it clicks and operates correctly. If it does not function as expected, replace it

  4. 4. Check the Wiring and Connectors

    Inspect the wiring and connectors associated with the A/C cutoff relay circuit. Look for frayed wires, broken connections, or corrosion that could cause an open or short circuit

  5. 5. Inspect the A/C System

    Ensure that the A/C system is functioning properly. Low refrigerant levels or other A/C system issues can sometimes trigger related codes. Check for leaks and ensure the system is charged correctly

  6. 6. Check the Throttle Position Sensor (TPS)

    Since this code is related to wide open throttle, ensure that the throttle position sensor is functioning correctly. A faulty TPS can send incorrect signals to the engine control module (ECM), leading to this code

  7. 7. Scan for Additional Codes

    Use an OBD-II scanner to check for any other trouble codes that may be present. Sometimes, multiple codes can provide more context for the issue

  8. 8. Clear the Code and Test Drive

    After performing the above checks and repairs, clear the code using an OBD-II scanner and take the vehicle for a test drive to see if the code returns

  9. 9. Consult a Professional

    If you are unable to resolve the issue after these steps, it may be best to consult a professional mechanic or technician who can perform more advanced diagnostics. By following these steps, you should be able to identify and resolve the issue related to the P1460 code