AutoCodes – Honda – P1791 1999 Honda Civic

P1791 1999 Honda Civic Code - Vehicle Speed Sensor Range/Performance Problem

Quick Answer

The Vehicle Speed Sensor (VSS) is driven by the differential. Common causes include Faulty Vehicle Speed Sensor, Vehicle Speed Sensor harness is open or shorted, Vehicle Speed Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1791 1999 Honda Civic indicates Vehicle Speed Sensor Range/Performance Problem.
Common causes: Common causes include Faulty Vehicle Speed Sensor, Vehicle Speed Sensor harness is open or shorted, Vehicle Speed Sensor circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,887

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 19, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1791 1999 Honda Civic Description

The Vehicle Speed Sensor (VSS) is driven by the differential. It generates a pulsed signal from an input 5 volts. The number of pulses per minute increases/decreases with the speed of the vehicle.

OBDII Code P1791 1999 Honda Civic - Vehicle Speed Sensor Range/Performance Problem - AutoCodes.com — P1791 1999 Honda Civic Code - Vehicle Speed Sensor Range/Performance Problem

What does this mean?

What are the Possible Causes of the DTC P1791 1999 Honda Civic?

Faulty Vehicle Speed Sensor
Vehicle Speed Sensor harness is open or shorted
Vehicle Speed Sensor circuit poor electrical connection

How to Fix the DTC P1791 1999 Honda Civic?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1791 1999 Honda Civic code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1791 1999 Honda Civic code?

Need more information on how to fix the P1791 1999 Honda Civic code? Get Access to Factory Service Manuals

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1791 1999 Honda Civic Code

1. What are the common symptoms of OBDII code P1791 on a 1999 Honda Civic?

- Common symptoms include erratic speedometer readings, inoperative cruise control, harsh shifting, and illuminated Check Engine Light.

2. What does the OBDII code P1791 for a 1999 Honda Civic indicate?

- The code P1791 indicates a Vehicle Speed Sensor Range/Performance Problem.

3. What are the possible causes of OBDII code P1791 on a 1999 Honda Civic?

- Possible causes include a faulty vehicle speed sensor, damaged wiring or connectors, sensor alignment issues, or a malfunctioning speedometer.

4. How can I diagnose the Vehicle Speed Sensor on a 1999 Honda Civic?

- You can diagnose the Vehicle Speed Sensor by checking the sensor's wiring and connectors for damage, testing the sensor's output signal, and verifying the sensor's alignment.

5. Can a faulty Vehicle Speed Sensor cause other issues besides triggering code P1791 on a 1999 Honda Civic?

- Yes, a faulty Vehicle Speed Sensor can also cause issues such as incorrect shifting patterns, inaccurate speedometer readings, and non-functioning cruise control.

6. How can I repair OBDII code P1791 on a 1999 Honda Civic?

- Repairing code P1791 involves replacing the faulty Vehicle Speed Sensor, repairing any damaged wiring or connectors, and ensuring proper alignment of the sensor.

7. Is it safe to continue driving with OBDII code P1791 on a 1999 Honda Civic?

- It is not recommended to continue driving with code P1791 present, as it can affect the vehicle's performance and safety systems.

8. Can a DIY enthusiast fix OBDII code P1791 on a 1999 Honda Civic?

- Yes, a DIY enthusiast with the necessary tools and knowledge can fix code P1791 by replacing the Vehicle Speed Sensor and addressing any related issues.

9. How much does it typically cost to repair OBDII code P1791 on a 1999 Honda Civic?

- The cost of repairing code P1791 can vary depending on the cause of the issue, but typically ranges from $100 to $300 for parts and labor.

10. Will resetting the Check Engine Light resolve OBDII code P1791 on a 1999 Honda Civic?

- Resetting the Check Engine Light may temporarily turn off the light, but it will not fix the underlying issue causing code P1791. It is important to diagnose and repair the problem to prevent it from reoccurring.