P1608 Code - Engine Control Module Malfunction

Quick Answer

The P1608 diagnostic trouble code (DTC) indicates a malfunction in the Engine Control Module (ECM), also known as the Powertrain Control Module (PCM) or Engine Control Unit (ECU). Common causes include Electrical issues such as a faulty ECM power supply or wiring, Water or moisture damage to the ECM, Corrosion on ECM connectors. 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

P1608 indicates Engine Control Module Malfunction.

Common causes

Common causes include Electrical issues such as a faulty ECM power supply or wiring, Water or moisture damage to the ECM, Corrosion on ECM connectors.

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.

• Description
• Common Causes
• Symptoms
• How To Fix
• Cost to Fix
• FAQs
• Comments
• Add Comment

Common Causes of P1608

Symptoms of P1608

How to Fix P1608

Cost to Fix P1608

Need more information about the P1608 code?

Need more information on how to fix the P1608 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1608 code diagnosed by a professional: Find a repair shop in your area

Code P1608 Information for Specific Makes

• P1608 Acura — Engine Control Module Malfunction
• P1608 Audi — Power Steering Pressure Switch Circuit Malfunction
• P1608 Buick — Serial Communication Problem With Device 8
• P1608 Cadillac — Serial Communication Problem With Device 8
• P1608 Chevrolet — Serial Communication Problem With Device 8
• P1608 Ford — Fuel Injection Pump Watchdog Malfunction
• P1608 GMC — Serial Communication Problem With Device 8
• P1608 Hyundai — Vacuum Solenoid Valve Electrical
• P1608 Infiniti — VVEL Sensor Power Supply
• P1608 Jaguar — Engine Control Module Malfunction
• P1608 KIA — Engine Control Module Malfunction
• P1608 Lexus — Engine Control Module Malfunction
• P1608 Mazda — Engine Control Module Malfunction
• P1608 Nissan — VVEL Sensor Power Supply
• P1608 Saab — Engine Control Module Defective
• P1608 Toyota — Engine Control Module Malfunction
• P1608 Volkswagen — Power Steering Pressure Switch Circuit 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 P1608 Code

1. What are the common symptoms of OBDII code P1608 (Engine Control Module Malfunction)?

- Common symptoms include engine stalling, rough idling, poor acceleration, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P1608?

- Possible causes include a faulty engine control module (ECM), wiring issues, poor connections, or a software malfunction within the ECM.

3. How can I diagnose OBDII code P1608?

- Diagnosing this code typically involves using an OBDII scanner to retrieve the code, checking the ECM connections, and performing a thorough inspection of the wiring harness for any damage.

4. Can a DIY enthusiast repair OBDII code P1608?

- While some DIY enthusiasts may be able to address simple wiring or connection issues, diagnosing and repairing a faulty ECM often requires professional knowledge and specialized equipment.

5. Is it safe to drive with OBDII code P1608 present?

- It is not recommended to drive with this code present as it can lead to potential engine performance issues and further damage if left unaddressed.

6. How much does it typically cost to repair OBDII code P1608?

- The cost of repairing this code can vary depending on the root cause of the issue, but it may range from a few hundred dollars for minor repairs to over a thousand dollars for ECM replacement.

7. Can resetting the ECM clear OBDII code P1608?

- Resetting the ECM may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear after driving the vehicle.

8. What should I do if OBDII code P1608 keeps returning after repairs?

- If the code keeps returning after repairs, it may indicate an ongoing issue with the ECM or wiring that requires further diagnosis by a professional mechanic.

9. Are there any preventive maintenance tips to avoid OBDII code P1608?

- Regular vehicle maintenance, including checking and cleaning ECM connections, inspecting wiring harnesses, and keeping the engine well-tuned, can help prevent issues that may trigger this code.

10. Can a software update fix OBDII code P1608?

- In some cases, updating the ECM software may resolve the issue triggering this code, but it is recommended to consult with a qualified technician to determine the best course of action.