AutoCodes – Generic – P1624

P1624 Code - Malfunction Indicator Lamp Request Signal Active

Quick Answer

This Diagnostic Trouble Code (DTC) is stored in the Engine Control Module (ECM) when a fault code is detected. Common causes include Fault Codes stored in Transmission Control Module, Faulty Engine Control Module (ECM). 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
P1624 indicates Malfunction Indicator Lamp Request Signal Active.
Common causes
Common causes include Fault Codes stored in Transmission Control Module, Faulty Engine Control Module (ECM).
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 62,391
How popular is this code, among other codes? Medium
Table of contents Created and updated by William Orellana on Jul 12, 2020
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Code P1624 Description

This Diagnostic Trouble Code (DTC) is stored in the Engine Control Module (ECM) when a fault code is detected. This code will be stored when DTC is detected in the Transmission Control Module (TCM) and the malfunction indicator light signal is active. The TCM request the ECM turn Malfunction Indicator Lamp (MIL) ON.
OBDII Code P1624 - Malfunction Indicator Lamp Request Signal Active - AutoCodes.com
P1624 Code - Malfunction Indicator Lamp Request Signal Active

What are the Possible Causes of the DTC P1624?

  • Fault Codes stored in Transmission Control Module
  • Faulty Engine Control Module (ECM)

How to Fix the DTC P1624?

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 P1624 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 P1624 code?

Need more information on how to fix the P1624 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1624 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

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 P1624 Code

1. What are the common symptoms of OBDII code P1624?

- The common symptoms of code P1624 include the illumination of the Malfunction Indicator Lamp (MIL) or Check Engine Light on the dashboard.

2. What does the OBDII code P1624 indicate?

- OBDII code P1624 indicates that the Malfunction Indicator Lamp (MIL) request signal is active, meaning there is an issue with the communication between the vehicle's onboard computer and the indicator light.

3. What are the possible causes of OBDII code P1624?

- Possible causes of OBDII code P1624 include a faulty wiring connection between the engine control module and the indicator light, a malfunctioning indicator light itself, or a problem with the engine control module.

4. How serious is OBDII code P1624?

- OBDII code P1624 is not typically a serious issue on its own, but it should not be ignored as it may indicate an underlying problem with the vehicle's diagnostic system that could potentially affect other systems.

5. Can I continue driving with OBDII code P1624?

- It is generally safe to continue driving with OBDII code P1624, but it is recommended to have the issue diagnosed and repaired as soon as possible to prevent any potential problems from arising.

6. How is OBDII code P1624 diagnosed?

- Diagnosis of OBDII code P1624 involves using an OBDII scanner to retrieve the code from the vehicle's computer system and then inspecting the wiring and components related to the Malfunction Indicator Lamp.

7. How can OBDII code P1624 be repaired?

- Repairing OBDII code P1624 may involve checking and repairing any faulty wiring connections, replacing a malfunctioning indicator light, or addressing any issues with the engine control module that may be causing the signal to be active.

8. Is it possible to reset OBDII code P1624 without repairs?

- While clearing the code with an OBDII scanner may temporarily turn off the Malfunction Indicator Lamp, it is not recommended to reset the code without addressing the underlying issue, as it may result in the problem persisting or worsening.

9. Will OBDII code P1624 cause a vehicle to fail an emissions test?

- OBDII code P1624 alone may not cause a vehicle to fail an emissions test, but it is a good idea to have the issue resolved before undergoing emissions testing to ensure the vehicle is in proper working order.

10. Can a DIY enthusiast fix OBDII code P1624 at home?

- Depending on the cause of OBDII code P1624, some DIY enthusiasts with the necessary skills and tools may be able to diagnose and repair the issue at home, but it is recommended to seek professional help if unsure.

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