OBD Guide
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P16DA

Electric Vacuum Pump Relay 1 Stuck Off

P16DA is an OBD-II diagnostic trouble code meaning: Electric Vacuum Pump Relay 1 Stuck Off. Common causes: faulty vacuum pump relay, open or short circuit in the relay control circuit. Estimated repair cost: $6–28.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–28 (est.)

Symptoms

  • Check Engine Light Is On
  • Reduced braking performance
  • Hard brake pedal
  • Unusual noises when operating the brakes
  • Increased braking distance

Causes

  • Faulty vacuum pump relay
  • Open or short circuit in the relay control circuit
  • Poor contact in relay connector
  • Blown fuse
  • Problems with the engine control unit (ECU)

How to Fix

  1. Check the condition of the vacuum pump relay
  2. Check the integrity of the relay control circuit
  3. Inspect connectors and contacts for corrosion or damage
  4. Replace the relay if it is faulty
  5. Check and replace blown fuses

Related codes

P16DBP16DCP16DD

FAQ

What does the P16DA code mean?

P16DA is an OBD-II diagnostic trouble code that indicates: Electric Vacuum Pump Relay 1 Stuck Off

What causes a P16DA error code?

The most common causes of P16DA include: Faulty vacuum pump relay; Open or short circuit in the relay control circuit; Poor contact in relay connector; Blown fuse.

How do I fix a P16DA diagnostic trouble code?

To fix P16DA: Check the condition of the vacuum pump relay. Check the integrity of the relay control circuit. Inspect connectors and contacts for corrosion or damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P16DA?

Limited driving only, diagnose soon

How much does it cost to fix P16DA?

The estimated repair cost for P16DA is $6–28. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat