AutoCodes – Honda – P1508 2000 Honda Civic

P1508 2000 Honda Civic Code - Idle Air Control Valve Circuit Malfunction

Quick Answer

The target idle speed is in the Engine Control Module (ECM) memory for various engine conditions (coolant temperature, A/C operation and so on). Common causes include Faulty Idle Air Control Valve, Idle Air Control Valve harness is open or shorted, Idle Air Control Valve 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: P1508 2000 Honda Civic indicates Idle Air Control Valve Circuit Malfunction.
Common causes: Common causes include Faulty Idle Air Control Valve, Idle Air Control Valve harness is open or shorted, Idle Air Control Valve 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 6,843

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 25, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1508 2000 Honda Civic Description

The target idle speed is in the Engine Control Module (ECM) memory for various engine conditions (coolant temperature, A/C operation and so on). The ECM keeps the actual idle speed at the target idle speed by switching the Idle Air Control Valve IACV) ON/OFF to control the intake airflow. If the IACV output duty cycle (the length of ON time) is out of a specified range, a malfunction is detected and a DTC is stored.

OBDII Code P1508 2000 Honda Civic - Idle Air Control Valve Circuit Malfunction - AutoCodes.com — P1508 2000 Honda Civic Code - Idle Air Control Valve Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P1508 2000 Honda Civic?

Faulty Idle Air Control Valve
Idle Air Control Valve harness is open or shorted
Idle Air Control Valve circuit poor electrical connection

How to Fix the DTC P1508 2000 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 P1508 2000 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 P1508 2000 Honda Civic code?

Need more information on how to fix the P1508 2000 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 P1508 2000 Honda Civic Code

1. What are the common symptoms of OBDII code P1508 in a 2000 Honda Civic?

- Common symptoms include rough idle, stalling at idle, decreased fuel efficiency, and potential loss of power.

2. What causes the Idle Air Control Valve Circuit Malfunction in a 2000 Honda Civic triggering code P1508?

- The main causes can be a faulty idle air control valve, wiring issues, or a malfunctioning PCM (Powertrain Control Module).

3. How can I diagnose the Idle Air Control Valve Circuit Malfunction in my 2000 Honda Civic?

- Diagnosis involves checking the idle air control valve for proper functioning, inspecting wiring connections for damage, and scanning for any other related trouble codes.

4. Can a dirty throttle body cause OBDII code P1508 to appear in a 2000 Honda Civic?

- Yes, a dirty throttle body can disrupt the air-fuel mixture and cause idle control issues, potentially triggering the P1508 code.

5. What are the repair options for fixing OBDII code P1508 in a 2000 Honda Civic?

- Repair options may include cleaning or replacing the idle air control valve, repairing damaged wiring, cleaning the throttle body, or recalibrating the PCM.

6. Is it safe to continue driving my 2000 Honda Civic with OBDII code P1508 present?

- It is not recommended to drive the vehicle with the P1508 code, as it can lead to more severe issues like engine stalling or poor performance.

7. How much does it typically cost to repair OBDII code P1508 in a 2000 Honda Civic?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from $100-$500 for parts and labor.

8. Can I reset the OBDII code P1508 in my 2000 Honda Civic by disconnecting the battery?

- While disconnecting the battery may temporarily clear the code, it is important to diagnose and address the underlying issue to prevent the code from reappearing.

9. Will replacing the idle air control valve resolve the Idle Air Control Valve Circuit Malfunction in a 2000 Honda Civic?

- In many cases, replacing a faulty idle air control valve can correct the issue triggering the P1508 code, but it's essential to verify proper diagnosis first.

10. How can I prevent OBDII code P1508 from reoccurring in my 2000 Honda Civic after repair?

- To prevent the code from reoccurring, ensure regular maintenance of the idle air control valve, throttle body, and related components, and address any wiring issues promptly.