[SOLVED] P1634 Code: Ignition 1 Power Circuit Low Voltage – How To Fix It!

The automobile fault code P1634 indicates a problem with the Ignition Control Module (ICM) or the Ignition 1 Power circuit.

The most common symptom is the Engine Light being ON or the Service Engine Soon Warning Light.

To fix this issue, you should visually inspect the wiring harness and connectors for any damage. Check for broken, bent, pushed out, or corroded pins in the connectors. The repair time for this problem is estimated to be around 1.0 hour.

It is important to address this issue promptly to prevent further damage to the ignition 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 p1634 fault code.

  • The symptoms of the automobile fault code p1634 include the Engine Light being ON or the Service Engine Soon Warning Light being illuminated.

The automobile fault code p1634 can be caused by a faulty Ignition Control Module (ICM), faulty Ignition 1 Power, an open or shorted Ignition 1 Power harness, or a poor electrical connection in the Ignition 1 Power circuit.

  • The fault code P1634 can be caused by a faulty Ignition Control Module (ICM), a faulty Ignition 1 Power, an open or shorted Ignition 1 Power harness, or a poor electrical connection in the Ignition 1 Power circuit.

To fix the automobile fault code p1634, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

  • To fix the automobile fault code p1634, follow these steps: 1.
  • Check the possible causes mentioned above.
  • 2.
  • Visually inspect the wiring harness and connectors.
  • 3.
  • Look for damaged components.
  • 4.
  • Check for broken, bent, pushed out, or corroded connector pins.
  • 5.
  • Estimated repair time: 1.0 hour.

The factors influencing the cost of diagnosing and fixing the automobile fault code p1634 are the estimated repair time of 1.0 hour and the typical hourly rate charged by auto repair shops, which ranges between $75 and $150.

The P1634 fault code indicates that there is a problem with the Ignition 1 Power Circuit voltage in the vehicle. This means that when the key is turned on, the Powertrain Control Module (PCM) did not receive any Class 2 serial data and detected a low voltage in Circuit 1. This fault code can cause issues with the vehicle’s ignition system, leading to difficulties in starting the engine or even a complete failure to start.

It is important to address this issue promptly to avoid any further damage to the vehicle’s electrical system. To fix this problem, you should first check the wiring and connections in the Ignition 1 Power Circuit. Look for any loose or damaged wires, and ensure that all connections are secure.

If any issues are found, they should be repaired or replaced as necessary.

Additionally, it may be necessary to reset the PCM to clear the fault code and see if the issue persists. If the problem continues, it is recommended to seek the assistance of a qualified mechanic for further diagnosis and repair.

What are the possible causes for the automobile fault code p1634 and how can I visually inspect them?

If you’re seeing the engine light or service engine soon warning light and the fault code is p1634, there are a few possible causes to consider. It could be a faulty Ignition Control Module (ICM), a problem with the Ignition 1 Power, an open or shorted Ignition 1 Power harness, or a poor electrical connection in the Ignition 1 Power circuit. To visually inspect these potential causes, check the wiring harness and connectors related to the ignition system. Look for any damaged components and examine the connector’s pins for signs of being broken, bent, pushed out, or corroded.

How can a faulty Ignition Control Module (ICM) or Ignition 1 Power 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 Ignition Control Module (ICM) or Ignition 1 Power. 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.

What should I look for when inspecting the wiring harness and connectors related to the p1634 fault code, and how can I identify damaged components or connector pins?

When inspecting the wiring harness and connectors related to the p1634 fault code, start by visually inspecting them. Look for any damaged components and check for broken, bent, pushed out, or corroded connector pins. These issues can often be identified through a thorough examination. By checking for these signs, you can pinpoint any potential problems and take the necessary steps to fix them.

p1634 error fault code explained

If you’re seeing the Engine Light ON or the Service Engine Soon Warning Light, the issue could be a faulty Ignition Control Module (ICM) or a problem with the Ignition 1 Power. To fix it, visually inspect the wiring harness and connectors, check for damaged components, and look for any broken, bent, pushed out, or corroded connector pins.

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