[SOLVED] P1774 Code: Fix Low Coast Brake Solenoid Valve Function Issue

The automobile fault code P1774 indicates a problem with the Low Coast Brake Solenoid Valve in the transmission system. This can cause the Engine Light or Service Engine Soon Warning Light to turn on.

The possible causes include a faulty solenoid valve, an open or shorted harness, poor electrical connection, or a faulty transmission valve body. To fix this issue, you should visually inspect the wiring harness and connectors for any damage. Look for broken, bent, pushed out, or corroded pins in the connectors.

The repair time for this issue is estimated to be around 1.0 hour. It is important to address this problem promptly to prevent further damage to the transmission system.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level10.0 (Out of 10)

When the engine light is on or the service engine soon warning light is illuminated, it could be a sign of the p1774 fault code.

  • The symptoms of the automobile fault code P1774 include the Engine Light being ON or the Service Engine Soon Warning Light being illuminated.

The automobile fault code p1774 can be caused by a faulty Low Coast Brake Solenoid Valve, an open or shorted harness, a poor electrical connection in the circuit, or a faulty Transmission Valve Body.

  • The fault code P1774 can be caused by the following: 1.
  • Faulty Low Coast Brake Solenoid Valve.
  • 2.
  • Low Coast Brake Solenoid Valve harness is open or shorted.
  • 3.
  • Low Coast Brake Solenoid Valve circuit has a poor electrical connection.
  • 4.
  • Faulty Transmission Valve Body.

To fix the automobile fault code p1774, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

  • To fix the automobile fault code p1774, you need to follow these steps: 1.
  • Check the possible causes mentioned above.
  • 2.
  • Visually inspect the wiring harness and connectors related to the fault code.
  • 3.
  • Look for any damaged components.
  • 4.
  • Check for broken, bent, pushed out, or corroded pins in the connectors.
  • The estimated repair time for this fix is 1.0 hour.

The automobile fault code P1774 can be diagnosed and fixed within an estimated repair time of 1.0 hour. The cost of the repair is typically charged by most auto repair shops between $75 and $150 per hour.

The P1774 fault code refers to an issue with the Low Coast Brake Solenoid Valve in the transmission system of a vehicle. This valve is responsible for controlling the engagement and disengagement of the low coast brake, which helps optimize gear shifting.

When the Transmission Control Module (TCM) sends signals to the Low Coast Brake Solenoid Valve based on inputs from the Park & Neutral Position (PNP) Switch, Vehicle Speed Sensor (VSS), and Accelerator Pedal Position (APP) Sensor, the valve should respond accordingly. However, if the valve fails to respond to the TCM signal, the P1774 code will be triggered. This fault code indicates a potential problem with the Low Coast Brake Solenoid Valve, which may result in improper gear shifting and affect the overall performance of the transmission system.

It is important to address this issue promptly to ensure smooth and efficient operation of the vehicle.

What are the possible causes of the automobile fault code p1774 and how can I visually inspect them?

If you’re seeing the fault code P1774 and your engine light is on, it could be due to a few possible causes. One of them could be a faulty Low Coast Brake Solenoid Valve, or it could be an issue with the wiring harness or connectors related to the valve. Another potential cause could be a problem with the transmission valve body. To visually inspect these potential causes, check the wiring harness and connectors for any damage, and look for any broken, bent, pushed out, or corroded pins on the connectors.

How can a faulty Low Coast Brake Solenoid Valve affect the engine light and what steps can I take to fix it?

If you notice the engine light or service engine soon warning light is on, it could be due to a faulty Low Coast Brake Solenoid Valve. To fix this issue, start by checking the possible causes mentioned above. Take a close look at the wiring harness and connectors, ensuring there are no visible damages. Additionally, check for any broken, bent, pushed out, or corroded pins in the connectors. Taking these steps will help diagnose and resolve the problem with the Low Coast Brake Solenoid Valve.

What should I look for when inspecting the wiring harness and connectors related to the Low Coast Brake Solenoid Valve to resolve the p1774 fault code?

When inspecting the wiring harness and connectors related to the Low Coast Brake Solenoid Valve to resolve the p1774 fault code, there are a few things to look for. Start by visually inspecting the wiring harness and connectors for any signs of damage. Check for broken, bent, pushed out, or corroded connector pins. These issues can cause a poor electrical connection or an open/short circuit. If any problems are found, they should be repaired or replaced to fix the fault code.

p1774 error fault code explained

If your engine light is on and you’re experiencing issues with your transmission, it could be due to a faulty Low Coast Brake Solenoid Valve or a problem with the Transmission Valve Body. To fix this, visually inspect the wiring harness and connectors for any damage, and check for broken or corroded pins.

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