AutoCodes – Honda – P1508 1997 Honda Civic

P1508 1997 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 1997 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 4,921

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 1997 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 1997 Honda Civic - Idle Air Control Valve Circuit Malfunction - AutoCodes.com — P1508 1997 Honda Civic Code - Idle Air Control Valve Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P1508 1997 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 1997 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 1997 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 1997 Honda Civic code?

Need more information on how to fix the P1508 1997 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 1997 Honda Civic Code

1. What are the common symptoms of OBDII code P1508 in a 1997 Honda Civic?

- Common symptoms include rough idling, stalling at idle, fluctuating idle speed, and potential difficulties starting the vehicle.

2. What can cause the Idle Air Control Valve Circuit Malfunction in a 1997 Honda Civic?

- Possible causes of P1508 in a 1997 Honda Civic include a faulty idle air control valve, issues with the wiring or connectors, or a problem with the engine control module (ECM).

3. How can I diagnose the cause of OBDII code P1508 on my 1997 Honda Civic?

- Diagnostic steps include checking the idle air control valve for proper operation, inspecting wiring and connectors for damage, and using a scan tool to monitor data from the ECM.

4. Can a dirty or clogged idle air control valve trigger code P1508 in a 1997 Honda Civic?

- Yes, a dirty or clogged idle air control valve can disrupt its function and potentially trigger the Idle Air Control Valve Circuit Malfunction code.

5. What are some repair tips for fixing OBDII code P1508 on a 1997 Honda Civic?

- Repair tips may include cleaning or replacing the idle air control valve, repairing damaged wiring or connectors, and resetting the ECM after making necessary repairs.

6. Is it safe to continue driving a 1997 Honda Civic with OBDII code P1508?

- It is not recommended to drive the vehicle with P1508 as it can lead to further engine issues and potential safety concerns due to erratic idling or stalling.

7. Can resetting the ECM clear the P1508 code on a 1997 Honda Civic?

- Resetting the ECM may temporarily clear the code, but it is essential to diagnose and address the root cause to prevent the code from reoccurring.

8. How much does it typically cost to repair OBDII code P1508 on a 1997 Honda Civic?

- The cost of repairs for P1508 can vary depending on the specific issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Will disconnecting the battery reset the P1508 code on a 1997 Honda Civic?

- Disconnecting the battery may reset the code temporarily, but proper diagnosis and repair of the underlying issue are necessary to prevent the code from coming back.

10. Can a DIY enthusiast fix OBDII code P1508 on a 1997 Honda Civic?

- Some simple repairs, such as cleaning the idle air control valve or checking for loose connections, can be done by a DIY enthusiast. However, more complex issues may require professional help.