OBD Guide
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P1563

Quantity Adjuster Lower Stop Value

P1563 is an OBD-II diagnostic trouble code meaning: Quantity Adjuster Lower Stop Value. Common causes: wear of mechanical components of the injection pump, regulator solenoid valve problems. Estimated repair cost: $56–278.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–278 (est.)

Symptoms

  • Unstable engine operation at idle
  • Reduced engine power
  • Dips during acceleration
  • Increased fuel consumption
  • Difficulty starting the engine

Causes

  • Wear of mechanical components of the injection pump
  • Regulator Solenoid Valve Problems
  • Fuel system contamination
  • Regulator position sensor malfunction
  • Problems in the wiring harness or connectors

How to Fix

  1. Check the condition of the fuel filter
  2. Diagnose the operation of the injection pump
  3. Check the regulator solenoid valve
  4. Check the integrity of the wiring harness and connectors
  5. If necessary, replace or repair the injection pump

Related codes

P1562P1564P1565

Error P1563 by Vehicle Brand

BuickCadillacChevroletChryslerGMGMCOldsmobileSaturnVolkswagen

FAQ

What does the P1563 code mean?

P1563 is an OBD-II diagnostic trouble code that indicates: Quantity Adjuster Lower Stop Value

What causes a P1563 error code?

The most common causes of P1563 include: Wear of mechanical components of the injection pump; Regulator Solenoid Valve Problems; Fuel system contamination; Regulator position sensor malfunction.

How do I fix a P1563 diagnostic trouble code?

To fix P1563: Check the condition of the fuel filter. Diagnose the operation of the injection pump. Check the regulator solenoid valve. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1563?

Limited driving only, diagnose soon

How much does it cost to fix P1563?

The estimated repair cost for P1563 is $56–278. Actual cost depends on your vehicle, location, and labor rates.

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