P1603 Code - Engine Stall History

Quick Answer

The P1603 code indicates that there has been a history of engine stall in the vehicle. Common causes include Faulty fuel pump or fuel filter, Ignition system issues such as faulty spark plugs or ignition coils, Malfunctioning sensors like the crankshaft position sensor or camshaft position sensor. 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

P1603 indicates Engine Stall History.

Common causes

Common causes include Faulty fuel pump or fuel filter, Ignition system issues such as faulty spark plugs or ignition coils, Malfunctioning sensors like the crankshaft position sensor or camshaft position sensor.

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 P1603

Symptoms of P1603

How to Fix P1603

Cost to Fix P1603

Need more information about the P1603 code?

Need more information on how to fix the P1603 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1603 code diagnosed by a professional: Find a repair shop in your area

Code P1603 Information for Specific Makes

• P1603 Audi — Engine Control Module Defective
• P1603 Buick — Loss Of Sensing Diagnostic Mode Data Conditions
• P1603 Cadillac — Loss Of Sensing Diagnostic Mode Data Conditions
• P1603 Chevrolet — Loss Of Sensing Diagnostic Mode Data Conditions
• P1603 Chrysler — PCM Internal Dual-Port Communication Failure
• P1603 Dodge — PCM Internal Dual-Port Communication Failure
• P1603 GMC — Loss Of Sensing Diagnostic Mode Data Conditions
• P1603 Hyundai — CAN Communication Bus Error
• P1603 Jeep — PCM Internal Dual-Port Communication Failure
• P1603 KIA — CAN Communication Bus Error
• P1603 Lexus — Engine Stall History
• P1603 Mazda — Engine Control Module Incorrect Immobilizer Code
• P1603 Mercedes-Benz — Engine Control Module Defective
• P1603 Mitsubishi — Battery Backup Line Malfunction
• P1603 RAM — PCM Internal Dual-Port Communication Failure
• P1603 Saab — Engine Control Module Defective
• P1603 Scion — Engine Stall History
• P1603 Toyota — Engine Stall History
• P1603 Volkswagen — Engine Control Module Defective

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 P1603 Code

1. What are common symptoms of OBDII code P1603 (Engine Stall History)?

- Common symptoms include engine stalling or hesitation, rough idling, and difficulty starting the vehicle.

2. What causes OBDII code P1603 (Engine Stall History) to trigger?

- This code is typically triggered by a history of engine stalling events, which may be caused by issues such as a faulty ignition system, fuel delivery problems, or sensor malfunctions.

3. Can a dirty or faulty mass airflow sensor (MAF) trigger code P1603?

- Yes, a dirty or faulty MAF sensor can affect air-fuel mixture, leading to engine stalling events that trigger code P1603.

4. How can I diagnose the cause of OBDII code P1603 (Engine Stall History)?

- Diagnosis typically involves checking for related codes, inspecting the ignition system, testing the fuel delivery system, and verifying sensor functionality.

5. Is it safe to continue driving with OBDII code P1603 (Engine Stall History) present?

- It is not recommended to continue driving with this code present, as persistent engine stalling can pose safety risks and potentially cause further damage to the vehicle.

6. Can a clogged fuel filter be a possible cause of OBDII code P1603?

- Yes, a clogged fuel filter can restrict fuel flow, leading to engine stalling events that may trigger code P1603.

7. How can I repair OBDII code P1603 (Engine Stall History)?

- Repair methods may include cleaning or replacing the MAF sensor, addressing any ignition system issues, replacing a clogged fuel filter, and resolving any other underlying causes of engine stalling.

8. Can a faulty crankshaft position sensor cause OBDII code P1603 to appear?

- Yes, a faulty crankshaft position sensor can disrupt engine timing and contribute to engine stalling events that trigger code P1603.

9. Will resetting the OBDII system clear code P1603 (Engine Stall History)?

- Resetting the system may clear the code temporarily, but it is important to address the underlying issue causing the engine stalling to prevent the code from reappearing.

10. How do I prevent OBDII code P1603 (Engine Stall History) from recurring?

- Regular maintenance, such as inspecting and replacing worn components, keeping the fuel system clean, and addressing any engine performance issues promptly, can help prevent code P1603 from recurring.