AutoCodes – Chevrolet – P1508 Chevrolet

P1508 Chevrolet Code - Idle Speed Low Idle Air Control System Not Responding

Quick Answer

P1508 Chevrolet indicates Idle Speed Low Idle Air Control System Not Responding. Common causes include Faulty Idle Air Control (IAC), 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 Chevrolet indicates Idle Speed Low Idle Air Control System Not Responding.
Common causes: Common causes include Faulty Idle Air Control (IAC), 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 10,041

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 Chevrolet Description

OBDII Code P1508 Chevrolet - Idle Speed Low Idle Air Control System Not Responding - AutoCodes.com — P1508 Chevrolet Code - Idle Speed Low Idle Air Control System Not Responding

What does this mean?

What are the Possible Causes of the DTC P1508 Chevrolet?

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

How to Fix the DTC P1508 Chevrolet?

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 Chevrolet 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 Chevrolet code?

Need more information on how to fix the P1508 Chevrolet 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 Chevrolet Code

1. What are the common symptoms of OBDII code P1508 on a Chevrolet?

Symptoms may include a low idle speed, engine stalling at idle, rough idling, and potential difficulty starting the vehicle.

2. What does the OBDII code P1508 indicate on a Chevrolet?

The code P1508 indicates a problem with the Idle Air Control (IAC) system not responding properly, leading to low idle speed issues.

3. What are the possible causes of OBDII code P1508 on a Chevrolet?

Potential causes include a faulty IAC valve, dirty or clogged IAC valve, vacuum leaks, electrical issues, or a problem with the throttle body.

4. How can I diagnose the cause of OBDII code P1508 on my Chevrolet?

Diagnosis typically involves checking the IAC valve for proper operation, inspecting for vacuum leaks, testing the electrical connections, and ensuring the throttle body is clean and functioning correctly.

5. Can a dirty throttle body cause OBDII code P1508 on a Chevrolet?

Yes, a dirty throttle body can restrict airflow and cause the IAC system to respond improperly, triggering the P1508 trouble code.

6. How can I repair OBDII code P1508 on my Chevrolet?

Repair options may include cleaning or replacing the IAC valve, addressing any vacuum leaks, cleaning the throttle body, checking electrical connections, and resetting the trouble code.

7. Is it safe to continue driving my Chevrolet with OBDII code P1508?

It's not recommended to drive with a malfunctioning IAC system, as it can lead to poor engine performance, stalling, and other potential issues. It's best to address the problem promptly.

8. Can I reset the OBDII code P1508 on my Chevrolet without fixing the underlying issue?

While you can clear the trouble code using an OBDII scanner, it's essential to diagnose and repair the root cause to prevent the issue from recurring.

9. How much does it typically cost to repair OBDII code P1508 on a Chevrolet?

The cost of repair can vary depending on the specific cause of the issue, but it may range from a simple DIY cleaning job to a more significant repair involving part replacement, costing anywhere from $50 to $300 or more.

10. Will OBDII code P1508 cause my Chevrolet to fail an emissions test?

Yes, a malfunctioning IAC system can affect engine performance and emissions, potentially leading to a failed emissions test. It's crucial to address the issue before undergoing emissions testing.