Code P1693 on Dodge Cummins: Turbo Charge Control Circuit Malfunction

The P1693 fault code is a significant diagnostic code for Dodge Cummins engines. Vehicle owners and mechanics must understand its implications, symptoms, causes, and solutions to maintain its performance and longevity.

What is the P1693 Code?

The P1693 code, also known as the “Turbo Charge Control Circuit Malfunction,” is not a direct indicator of a specific problem but signifies that there are additional diagnostic trouble codes (DTCs) stored in the vehicle’s Powertrain Control Module (PCM) or Engine Control Unit (ECU). This code is often called the “companion code,” highlighting its role in pointing to other underlying issues.

Symptoms of Code P1693

Symptoms vary depending on the actual hidden code and may include:

• Difficulty in starting the engine.
• Rough engine running or cut-offs at certain speed levels.
• Reduced engine power, especially under heavy loads.

These symptoms are often related to problems in the VP44 fuel injection pump system or other fuel system components.

Causes and Solutions to Code P1693

VP44 Fuel Injection Pump Failure

A common cause for the P1693 code is a failure in the VP44 fuel injection pump. Symptoms of this failure include difficulty starting the engine, misfiring, smoky exhaust, and weak engine performance. The solution involves replacing the VP44 pump, following a specific step-by-step process.

Bad Accelerator Pedal Position Sensor (APPS)

Another possible cause is the Accelerator Pedal Position Sensor (APPS) malfunction. Symptoms include a check engine light, hesitation in vehicle movement, and poor acceleration. Replacing the APPS, following a prescribed set of steps, is the recommended solution.

How to Fix the P1693 Code?

Clearing the P1693 code should not be the primary focus. It is vital to address the underlying issues indicated by the companion codes. A code reader or suitable scan tool is needed to diagnose and fix the problem.

Conclusion

The P1693 code in Dodge Cummins engines is a critical indicator of other hidden diagnostic codes. Proper diagnosis and resolution of the underlying issues are essential for the efficient performance of the vehicle. It is recommended to consult a professional for accurate diagnosis and repair.

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FAQs About P1693 Dodge Cummins