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DTC codes / Ford codes / P1460

P1460 · FordWide Open Throttle Air Conditioning Cutoff Circuit Malfunction

P1460 on Ford vehicles indicates that the powertrain control module (PCM) has detected a fault in the wide-open throttle (WOT) air conditioning cutoff circuit, which is designed to disengage the A/C compressor clutch during heavy acceleration to maximize engine power. The PCM monitors the circuit for expected voltage changes when the A/C cutoff is commanded and sets this code when the signal is out of range or inconsistent with the command.

SystemPowertrain
Code typeFord specific
SeverityLow
Fix difficultyIntermediate
AreaAuxiliary emission controls

Symptoms you may notice

  • The air conditioning may continue to run during wide-open throttle, reducing acceleration performance.
  • The A/C compressor clutch may fail to engage at all, resulting in no cold air from the vents.
  • The check engine light (malfunction indicator lamp) illuminates on the dashboard.
  • In some cases, the driver may notice no symptoms besides the warning light.
  • The engine may feel sluggish or hesitate during hard acceleration if the A/C load is not cut off.
  • The A/C may cycle on and off erratically or blow warm air intermittently.

Common causes, most likely first

  1. Faulty wide-open throttle (WOT) air conditioning cutoff relay, which may be stuck open or closed.
  2. Damaged or corroded wiring in the WOT A/C cutoff circuit, including opens, shorts, or high resistance.
  3. Failed air conditioning compressor clutch or clutch coil that does not engage or disengage properly.
  4. Malfunctioning powertrain control module (PCM) output driver for the A/C cutoff circuit.
  5. Poor electrical connections at the PCM, relay, or A/C compressor clutch connector.
  6. A faulty throttle position sensor (TPS) or accelerator pedal position (APP) sensor that misreports WOT conditions, preventing proper A/C cutoff.

How to diagnose and fix it

  1. Verify the code with a scan tool and check for any related diagnostic trouble codes (DTCs) in the PCM and other modules.
  2. Inspect the WOT A/C cutoff relay and test it for proper operation, replacing it if faulty.
  3. Check all wiring and connectors in the WOT A/C cutoff circuit for damage, corrosion, or loose pins, and repair as needed.
  4. Test the A/C compressor clutch and clutch coil for resistance and proper engagement when 12 volts are applied.
  5. Use a scan tool to command the A/C cutoff on and off while monitoring the circuit voltage or relay operation to isolate the fault.
  6. Check the throttle position sensor (TPS) and accelerator pedal position (APP) sensor signals for smooth operation through the full range, especially near wide-open throttle.
  7. If all external components test good, diagnose the PCM output driver and replace the PCM only after confirming all other possibilities.

Don't overlook the throttle position sensor

  • A marginal throttle position sensor (TPS) that does not accurately report wide-open throttle can prevent the PCM from commanding the A/C cutoff, setting P1460 without any A/C circuit fault.
  • The WOT A/C cutoff relay is often the same type as other relays in the underhood fuse box, so swapping it with a known-good relay is a quick diagnostic step.
  • Corroded or loose ground connections at the A/C compressor clutch or chassis can cause intermittent P1460 codes that do not appear during static testing.
  • On some Ford models, the A/C cutoff signal is integrated into the smart junction box (SJB) or body control module (BCM), so a fault there can mimic a PCM issue.
  • P1460 can be set by a faulty A/C pressure switch that misreports system pressure, causing the PCM to inhibit A/C operation and detect an unexpected circuit state.

Can I keep driving with P1460?

The vehicle remains safe to drive because P1460 does not affect engine safety or emissions significantly, but you may experience reduced A/C performance or slightly lower power during hard acceleration. Avoid prolonged wide-open throttle driving until the fault is repaired to prevent unnecessary compressor wear.

Tools that help

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Guidance is general and written for Ford vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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