AutoCodes – Generic – P1654

P1654 Code - Instrumentation Control Module System Malfunction

Quick Answer

The Diagnostic Trouble Code (DTC) P1654 means that the Instrumentation Control Module must be check for codes. Common causes include Check engine oil level, Faulty Coolant Temperature Sensor, Coolant Temperature Sensor harness is open or shorted. 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: P1654 indicates Instrumentation Control Module System Malfunction.
Common causes: Common causes include Check engine oil level, Faulty Coolant Temperature Sensor, Coolant Temperature Sensor harness is open or shorted.
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 57,531

How popular is this code, among other codes? Medium

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 19, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1654 Description

The Diagnostic Trouble Code (DTC) P1654 means that the Instrumentation Control Module must be check for codes. Check codes in the Instrumentation Control Module and perform the repairs for each code. Common problems are the Engine Oil Level and Coolant Temperature Sensor.

OBDII Code P1654 - Instrumentation Control Module System Malfunction - AutoCodes.com — P1654 Code - Instrumentation Control Module System Malfunction

What does this mean?

What are the Possible Causes of the DTC P1654?

Check engine oil level
Faulty Coolant Temperature Sensor
Coolant Temperature Sensor harness is open or shorted
Coolant Temperature Sensor circuit poor electrical connection

How to Fix the DTC P1654?

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 P1654 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 P1654 code?

Need more information on how to fix the P1654 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1654 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1654 Audi — Instrumentation Control Module System Malfunction
P1654 Buick — A/C Relay Control Circuit Conditions
P1654 Cadillac — A/C Relay Control Circuit Conditions
P1654 Chevrolet — A/C Relay Control Circuit Conditions
P1654 Dodge — MIL Control Circuit
P1654 GMC — A/C Relay Control Circuit Conditions
P1654 Saab — Fuel Pump Relay Open Circuit / Short To Ground
P1654 Volkswagen — Instrumentation Control Module System Malfunction

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 P1654 Code

1. What are the common symptoms of OBDII code P1654 (Instrumentation Control Module System Malfunction)?

- Common symptoms include issues with instrument panel gauges, warning lights not functioning properly, and inaccurate readings on the dashboard.

2. What are the possible causes of OBDII code P1654?

- The code P1654 can be triggered by a faulty instrumentation control module, damaged wiring or connectors in the instrument cluster circuit, or a software glitch in the module.

3. How can I diagnose the cause of OBDII code P1654?

- Diagnosing the code involves checking the instrument cluster wiring, connectors, and the control module for any signs of damage or loose connections. A scan tool can also help identify the specific issue.

4. Can a DIYer repair OBDII code P1654 at home?

- Depending on the cause of the code, a DIYer may be able to repair it at home by checking and fixing any damaged wiring or connectors. However, if the issue lies with the control module itself, professional help may be needed.

5. Is it safe to continue driving with OBDII code P1654 present?

- It is generally not recommended to continue driving with the code present, as inaccurate readings on the instrument panel can lead to safety concerns or further damage to the vehicle.

6. How much does it typically cost to repair OBDII code P1654?

- The cost of repairing the code can vary depending on the cause of the issue. Simple fixes like repairing wiring may be relatively inexpensive, while replacing the control module can be more costly.

7. Can resetting the OBDII system clear code P1654?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear once the problem resurfaces.

8. Will disconnecting the battery reset code P1654?

- Disconnecting the battery can reset the code, but it may not fix the root cause of the issue. It is important to diagnose and address the underlying problem to prevent the code from reoccurring.

9. How long does it take to repair OBDII code P1654?

- The repair time for OBDII code P1654 can vary depending on the cause of the issue and the complexity of the repair. Simple fixes may take a few hours, while more involved repairs could take longer.

10. Can a faulty instrumentation control module be repaired, or does it need to be replaced?

- In most cases, a faulty instrumentation control module will need to be replaced rather than repaired. It is recommended to consult with a professional to determine the best course of action.