AutoCodes – Isuzu – P0608 Isuzu

P0608 Isuzu Code - Vehicle Speed Output Circuit

Quick Answer

Various components apply a voltage to the Vehicle Speed Output circuit. Common causes include Faulty Vehicle Speed Sensor, Vehicle Speed Sensor harness is open or shorted, Vehicle Speed Sensor circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P0608 Isuzu indicates Vehicle Speed Output Circuit.
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: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 2,824

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0608 Isuzu Description

Various components apply a voltage to the Vehicle Speed Output circuit. The Powertrain Control Module (PCM) creates the Vehicle Speed Output signal by rapidly grounding this circuit via an internal switch called a driver. The driver operates at the same rate as the VSS signal input. The various components recognize the voltage being pulled to ground as an indication of vehicle speed.
The driver supplies the ground for the component being controlled. Each driver has a fault line which the PCM monitors. When the PCM commands a component ON, the voltage of the control circuit should be low (near 0 volts). When the PCM commands the control circuit to a component OFF, the voltage potential of the circuit should be high (near battery voltage).

OBDII Code P0608 Isuzu - Vehicle Speed Output Circuit - AutoCodes.com — P0608 Isuzu Code - Vehicle Speed Output Circuit

What does this mean?

What are the Possible Causes of the DTC P0608 Isuzu?

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

How to Fix the DTC P0608 Isuzu?

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 P0608 Isuzu 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 P0608 Isuzu code?

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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 P0608 Isuzu Code

1. What are common symptoms of OBDII code P0608 related to the Isuzu Vehicle Speed Output Circuit?

- Common symptoms include issues with the speedometer, ABS system, and transmission shifting irregularities.

2. What are the possible causes of OBDII code P0608 in an Isuzu?

- The code P0608 in an Isuzu could be triggered by a faulty vehicle speed sensor, damaged wiring, or a defective speedometer.

3. How can I diagnose the Vehicle Speed Output Circuit issue causing OBDII code P0608 in my Isuzu?

- To diagnose the problem, you can perform a visual inspection of the wiring, test the vehicle speed sensor, and use a scan tool to monitor speed sensor data.

4. Can a Vehicle Speed Output Circuit issue causing OBDII code P0608 be repaired at home?

- Depending on the exact cause, repairing the Vehicle Speed Output Circuit issue at home may be possible by replacing the speed sensor or repairing damaged wiring.

5. Is it safe to continue driving my Isuzu with OBDII code P0608 related to the Vehicle Speed Output Circuit issue?

- It is not recommended to drive your Isuzu with code P0608 as it can lead to inaccurate speed readings, affecting the proper functioning of the vehicle.

6. How much does it typically cost to repair OBDII code P0608 in an Isuzu at a repair shop?

- The cost of repairing OBDII code P0608 in an Isuzu can vary depending on the exact cause, but it may range from $100 to $300 for parts and labor.

7. Can a Vehicle Speed Output Circuit issue causing OBDII code P0608 affect the fuel efficiency of my Isuzu?

- Yes, a Vehicle Speed Output Circuit issue can affect the fuel efficiency of your Isuzu due to improper transmission shifting and inaccurate speed readings.

8. Are there any preventive measures to avoid OBDII code P0608 related to the Vehicle Speed Output Circuit in an Isuzu?

- Regular maintenance, such as checking the speed sensor and wiring integrity, can help prevent issues leading to code P0608 in an Isuzu.

9. Will resetting the OBDII system clear the P0608 code related to the Isuzu Vehicle Speed Output Circuit?

- Resetting the OBDII system may temporarily clear the code, but it will reappear if the underlying issue causing code P0608 is not addressed.

10. Can a Vehicle Speed Output Circuit issue causing OBDII code P0608 impact the overall performance of my Isuzu vehicle?

- Yes, a Vehicle Speed Output Circuit issue can impact the overall performance of your Isuzu, affecting speedometer accuracy and transmission operation.