[SOLVED] P1791 Code: Fix Vehicle Speed Sensor Range/Performance Issue With Ease!

The automobile fault code P1791 indicates a problem with the Vehicle Speed Sensor (VSS). The most common symptom is the Engine Light being ON or the Service Engine Soon Warning Light.

The cause of this fault code can be a faulty VSS, an open or shorted VSS harness, or a poor electrical connection in the VSS circuit. To fix this issue, you should visually inspect the wiring harness and connectors, checking for any damage or corrosion. Additionally, look for any 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 fault code promptly to ensure proper functioning of the vehicle.

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 automobile fault code: p1791.

  • The symptoms of the automobile fault code P1791 include the Engine Light being ON or the Service Engine Soon Warning Light being illuminated.

The automobile fault code P1791 can be caused by a faulty Vehicle Speed Sensor, an open or shorted Vehicle Speed Sensor harness, or a poor electrical connection in the Vehicle Speed Sensor circuit.

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  • The fault code P1791 can be caused by the following: a faulty Vehicle Speed Sensor, an open or shorted Vehicle Speed Sensor harness, and a poor electrical connection in the Vehicle Speed Sensor circuit.

To fix the automobile fault code p1791, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

  • To fix the automobile fault code P1791, 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 factors influencing the cost of diagnosing and fixing the automobile fault code P1791 are the estimated repair time of 1.0 hour and the typical auto repair shop charges of $75 to $150 per hour.

The P1791 fault code indicates a problem with the Vehicle Speed Sensor (VSS).

The VSS is responsible for generating a pulsed signal based on the speed of the vehicle. This signal is derived from a 5-volt input and the number of pulses per minute varies with the vehicle’s speed.

The P1791 code specifically points to a range or performance issue with the VSS. This means that the VSS may be providing inaccurate or inconsistent readings, which can affect the overall performance of the vehicle.

It is important to address this issue promptly to ensure proper functioning of the vehicle’s speed-related systems.

What are the possible causes of the automobile fault code P1791?

If you see the engine light or service engine soon warning light on, the fault code P1791 could be the culprit. This code is often caused by a faulty vehicle speed sensor or issues with the vehicle speed sensor harness, such as an open or shorted circuit. To fix the problem, visually inspect the wiring harness and connectors, checking for any damage or corrosion. Also, look out for broken, bent, pushed out, or corroded connector pins.

How can I visually inspect the wiring harness and connectors to fix the P1791 fault code?

To fix the P1791 fault code, start by visually inspecting the wiring harness and connectors. Look for any damaged components and check if there are any broken, bent, pushed out, or corroded pins in the connectors. This can help identify if the cause of the fault code is a faulty vehicle speed sensor, an open or shorted harness, or a poor electrical connection. Take note of any issues found during the inspection to guide further troubleshooting.

What should I look for when checking for damaged components or corroded connector pins to resolve the P1791 fault code?

When resolving the P1791 fault code, start by checking for damaged components or corroded connector pins. This can be done by visually inspecting the related wiring harness and connectors. Look for any signs of damage such as broken, bent, pushed out, or corroded pins. By addressing these issues, you can effectively fix the problem and get rid of the Engine Light or Service Engine Soon Warning Light.

p1791 error fault code explained

If your engine light is on and you’re experiencing issues with your vehicle speed, it could be due to a faulty vehicle speed sensor or a problem with the sensor’s wiring. To fix this, visually inspect the wiring harness and connectors for any damage or corrosion. Look out for broken or bent pins as well.

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