Engine-Codes - Generic - C1440

C1440 Code - Pressure Transducer Main/Primary Signal Faulted

- Code Popularity: 36,903 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
ChatAC AutoCodes.com AI Chat

What are the Possible Causes of the DTC C1440?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Hydraulic Control Unit (HCU)
  • Hydraulic Control Unit (HCU) harness is open or shorted
  • Hydraulic Control Unit (HCU) circuit poor electrical connection
⚠ Does your Car have Safety Recalls? → Check here

How to Fix the DTC C1440?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Search for C1440 Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the C1440 code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Anti-Lock Brake System (ABS) Warning Light ON
  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the C1440 Code Mean?

The pressure transducer is integral to the Hydraulic Control Unit (HCU). The pressure transducer sends a signal to the ABS module that varies in relation to the amount of pressure applied to the brake pedal. The more pressure that is applied, the greater the signal sent to the Anti-Lock Brake System (ABS) module. If a new pressure transducer is needed, then a new HCU must be installed.
When the brake pedal is pressed, the stop lamp switch closes and a voltage is sent to the Powertrain Control Module (PCM). The PCM then sends a message over the High-Speed Controller Area Network (HS-CAN) to the ABS module indicating that the brake pedal has been pressed. DTCs set in the ignition cycle can only be cleared by cycling the ignition off and on once the fault has been corrected.
This DTC sets in every ignition cycle if the signal that the pressure transducer sends to the ABS module does not agree with the stop lamp switch position.

C1440 Code - Pressure Transducer Main/Primary Signal Faulted

Need more Information on the Code?

Need more information on how to fix the C1440 code? Get Access to Factory Service Manuals

Code C1440 Information for Specific Makes

Need Help with the Code?

Get the C1440 code diagnosed by a professional: Find a repair shop in your area