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P1654: Service Throttle Soon Lamp Control Circuit

BUICK CADILLAC CHEVY GM GMC OLDSMOBILE OTHER SATURN
Severity
Medium
System
Manufacturer-Specific Powertrain

What Does P1654 Mean?

P1654 is a manufacturer-specific diagnostic trouble code: Service Throttle Soon Lamp Control Circuit. This code applies to BUICK, CADILLAC, CHEVY, GM, GMC vehicles. Unlike generic OBD-II codes, manufacturer-specific codes are defined by the vehicle maker and may only apply to certain makes and models.

Symptoms of P1654

Common Causes

Frequently Asked Questions

What does P1654 mean?
P1654 indicates: Service Throttle Soon Lamp Control Circuit. The vehicle's computer has detected that the Service Throttle Soon Lamp is not operating within its expected parameters and stored this diagnostic trouble code.
Can I drive with code P1654?
You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1654 for extended periods may cause additional problems.
How much does it cost to fix P1654?
Repair costs for P1654 typically range from $80 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

  • 🔧 Inspect and repair Service Throttle Soon Lamp wiring and connectors
  • 🔧 Replace faulty Service Throttle Soon Lamp
  1. 1
    Find your vehicle above

    Click your make and model for real owner reports and common causes specific to your vehicle.

  2. 2
    Check for recalls

    Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.

  3. 3
    Get a professional diagnosis

    A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

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