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P1633: Accelerator Pedal Position Sensor 2 Signal Too Low

VOLKSWAGEN BMW BUICK CADILLAC CHEVY GM GMC OLDSMOBILE
Severity
Medium
System
Manufacturer-Specific Powertrain

What Does P1633 Mean?

P1633 is a manufacturer-specific diagnostic trouble code: Accelerator Pedal Position Sensor 2 Signal Too Low. This code applies to VOLKSWAGEN, BMW, BUICK, CADILLAC, CHEVY 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 P1633

Common Causes

Frequently Asked Questions

What does P1633 mean?
P1633 indicates: Accelerator Pedal Position Sensor 2 Signal Too Low. The vehicle's computer has detected that the Accelerator Pedal Position Sensor 2 is not operating within its expected parameters and stored this diagnostic trouble code.
Can I drive with code P1633?
You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1633 for extended periods may cause additional problems.
How much does it cost to fix P1633?
Repair costs for P1633 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 Accelerator Pedal Position Sensor 2 and related wiring
  • 🔧 Replace faulty Accelerator Pedal Position Sensor 2
  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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